The Direct and Indirect Effect of Personality Traits on Political Attitudes. The mediating role of public sector affiliation Paper prepared for the IPSA Meeting, Madrid July 8-12 2012 RC29 Psycho-Politics Prof. Dr. Bernhard Kittel Department of Industrial Sociology University of Vienna Brünner Straße 72 A-1210 Vienna (AUT) [email protected] Jun. Prof. Dr. Markus Tepe (corresponding author) Positive Political Theory / Political Economy University of Oldenburg Ammerländer Heerstr. 114-118, 26111 Oldenburg (GER) [email protected] -1- Abstract Previous research has shown that government employees’ political attitudes and behavior differ from their private sector counterparts, but stops short of questions about the origin of these differences. This study presents a conceptual framework that refines the bureau voting model (BVM) by focusing on the interplay between personality traits and occupational experiences in shaping government employees’ political orientation. The conceptual framework is tested by fitting a path model to General Social Survey (GSS) data. Whereas government employment in service and production jobs is linked to higher turnout and leftwing attitudes, only two personality traits – extraversion and openness – exert substantially small effects on sector affiliation. On the basis of these findings the bureaucratic personality concept ought to be classified as an outdated myth. Rather than the distorted bureaucratic personality portrayed in some popular accounts, this study stresses the role of occupational experiences for government employees’ political preference formation. Keywords: government employees, personality traits, sector cleavage voting -1- INTRODUCTION Government employees have a reputation for being different, both in their personality and their political attitudes. Overconformity to rules, personal insecurities and effort-aversion are some characteristics frequently used to portray what has been labeled a “bureaucratic” personality (DeHart-Davis 2007). Concerning government employees’ political behavior, rational-choice accounts do not present a more sympathetic description. Government employees are considered as a homogenous interest group, which uses its electoral clout to protect their work privileges and to push for extensive public spending (Bush and Danzau 1977; Garand, Parkhurst and Seoud 1991). In times of growing fiscal constraints it is not surprising that politicians from all political camps utilize these ascriptions to create public support for the retrenchment of government employment (e.g. The Economist 2010, 9-10). Previous research has shown that government employees’ political attitudes and behavior differ from their private sector counterparts, but stops short of questions about the origin of these differences. This paper seeks to advance our understanding of government employees’ political attitudes and behavior by shifting attention towards the interplay between government employees’ personality traits and occupational experiences in shaping their political preferences. The central question is: do government employees’ political attitudes and behavior significantly differ from the rest of the population, and, if so, to which extent can these differences be explained by a distinct “bureaucratic” personality? In conceptualizing the nexus between government employment, personality traits and political attitudes and behavior, we consider four integrated mechanisms: First, sector cleavage voting suggests that government employees hold left-leaning state interventionist political views as they expect to benefit from left-wing governments in terms of salaries and job security (e.g. Garand, Parkhurst and Seoud 1991). Second, personality traits based voting presumes that -2- political attitudes and behavior result from inborn tempers and dispositional traits (e.g. Gerber, Huber, Doherty and Dowling 2011). Third, taking into account that government employees’ recruitment rules and career paths can differ rather substantially from those applying to the private sector, certain bureaucratic personalities might have a predisposition towards working for the government (e.g. DeHart-Davis 2007). Fourth, in this setup sector cleavage voting and personality traits based voting are not considered as mutually exclusive explanations for political attitudes and behavior. Instead, sector affiliation is expected to mediate the effect of personality traits on political attitudes and behavior. Thus, personality traits might impact on government employees’ political attitudes and behavior through their prior effect on sector affiliation. This set of nested hypothesis is tested by applying path analysis to General Social Survey (GSS) data from 2006. THEORETICAL FRAMEWORK Sector Cleavage Voting Rational choice accounts on bureaucratic behavior start from the assumption of self-interested rational actors who are not primarily interested in the goals of the organization they work for, but in maximizing their personal benefits (Niskanen 1971; Sears and Citrin 1982). In any organization, public or private, growth increases the likelihood of its employees to rise to a position where wages are higher (Bennett and Orzechowski 1983, 272). In the private sector, growth is determined by aggregate consumer demand, whereas public sector growth also depends on political majorities. This provides government employees with the opportunity to use their electoral clout to push for more public spending, which is supposed to increase their salaries and improve their working conditions (Bennett and Orzechowski 1983, 272). In order to translate their fiscal preferences into policy outcomes, government employees must outweigh contrary -3- preferences, e.g. held by self-employed and private sector employees, and they must bring a political party into government that actually raises public spending. Right-leaning parties may present an implicit or explicit threat to downsize government, whereas left-leaning parties are presumed to be more likely to maintain the status quo or to increase spending (Jensen et al. 2009, 712). Assuming political parties to hold identifiable partisan positions on public expenditure (Tufte 1978), government employees are predicted to vote for left-leaning parties. These are the micro-level foundations of what is known as the Bureau Voting Model (henceforth BVM). The primary goal of the BVM is to show that the size of public budgets is a consequence of government employees’ voting behavior (Garand 1988). This study focuses on the BVM’s individual level assumptions. In line with Garand et al. (1991, 179), we analyze government employees’ electoral turnout and support for left parties. (H1) Compared to private sector citizens, government employees are i) more likely to participate in elections and they are ii) more left-leaning in their political orientation. Prior studies tend to confirm that government employees are more likely to vote (Bennett and Orzechowski 1983; Borcherding, Bush and Spann 1977; Corey and Garand 2002; Frey and Pommerehne 1982; Jensen et al. 2009), even though in substantive terms the differences in turnout probabilities are rather small (Jensen et al. 2009; Jaarsma, Schram and Van Winden 1986). Empirical evidence on fiscal preferences and partisan orientation among government employees is more mixed. Knutsen’s (2005) descriptive analysis of public sector employees’ voting behavior across EU countries indicates that public sector employment correlates with leftwing voting, albeit the strength of this relationship varies across national contexts. For the US, Garand et al. (1991) find that turnout, pro-public-spending attitudes and left-wing voting -4- increases the likelihood of being a public servant. Employing international election study data from 18 countries, Jensen et al. (2009) show that public employees are more likely to consider themselves as left-leaning, to be more likely to participate in elections and to vote for left-wing parties. However, if the BVM requires that both predictions – higher turnout and support for leftwing parties – need to be confirmed within countries (Garand et al. 1991, 180), findings are rather weak (Jensen et al. 2009, 727). This study suggests two refinements to explain government employees’ political preference formation: First, by exclusively focusing on whether an individuals’ source of income is located in the private or public sector, the BVM neglects the possibility that individuals’ political preferences are shaped by their daily experiences in the occupational world (Tepe 2012). Different occupations expose government employees to different forms of client interaction and communicative experiences. Such experiences are expected to be more intense where employees deal with the development of human individuality as in counseling or social work (Kitschelt 1994, 17). Occupational experiences could therefore be important for employees to develop common political views and to vote as a single constituency (Kitschelt 1994, 15ff). According to these considerations it appears reasonable to move beyond a simple public/private sector dichotomy and to distinguish at least two large groups of government employees: highskilled employees in management and professional jobs and employees working in service and production jobs. If these two groups show different political attitudes and behavior, we can conclude that the incentives that stem from sector affiliation (public vs. private) are trumped by political views derived from government employees’ occupational experiences (high-skilled administrative tasks vs. service provision). The second refinement suggests that government employees’ political orientation might be already grounded in their personality. According to this argument, certain personalities select -5- themselves into government employment which indirectly affects their political behavior. Before we continue to conceptualize the link between personality traits and sector affiliation, we thus introduce the personality traits concept and discuss the direct relationship between personality traits and political attitudes and behavior. Personality Traits Based Voting Personality traits are considered as consistent patterns of thought, feelings and actions (McCrae and Costa 1990, 23). In contrast to values, which refer to “what a person considers as important”, personality traits describe “what a person is like” (Roccas et al. 2002). Building on the idea that socially relevant and salient personality characteristics are encoded in natural language, personality traits have been described by the BFI (John and Srivastava 1999, 103). The concept asserts that human personality can be measured on five dimensions: neuroticism, openness to experience, extraversion, agreeableness, and conscientiousness. Roccas, Sagiv, Schwartz and Knafo (2002, 792) describe the five traits as follows: “Individuals who score high on extraversion tend to be sociable, talkative, assertive, and active; those who score low tend to be retiring, reserved and cautious. Individuals who score high on agreeableness tend to be good-natured, compliant, modest, gentle and cooperative. Individuals who score low on this dimension tend to be irritable, ruthless, suspicious, and inflexible. Individuals who score high on openness tend to be intellectual, imaginative, sensitive and open-minded. Those who score low tend to be down-to-earth, insensitive, and conventional. Individuals scoring high on conscientiousness tend to be careful, thorough, responsible, organized and scrupulous. Those who score low on this dimension tend to be irresponsible, disorganized and unscrupulous. Individuals scoring high on neuroticism tend to be anxious, depressed, angry and insecure. Those scoring low on neuroticism tend to be calm, poised, and emotionally stable.” Political scientists have shown growing interest in personality traits as an explanation for political attitudes and behavior (see Gerber, Huber, Doherty and Dowling (2011) for review). Concerning political ideology the most consistent results have been found for openness (Gerber -6- et al. 2011, 271). People scoring high on openness are more likely to favor government involvement in the economy and are more likely to support liberal parties. People scoring high on conscientiousness tend to be attracted by compliance with social norms and are more supportive towards conservative parties (Gerber et al. 2011, 269). Gerber et al. (2010) find a twofold effect for agreeableness as respondents scoring high in this dimension are more likely to respond sympathetically to individuals in economic need, but also show higher levels of social conservatism (Gerber et al. 2011, 271). Others have associated agreeableness with a communal orientation and support for liberal parties (Barbaranelli, Caprara, Vecchione and Fraley 2007, Caprara, Barbaranelli and Zimbardo 1999, Mondak and Halperin 2008, Schoen and Schumann 2007). Research on the relationship between personality traits and political participation has yielded less consistent findings (Gerber at al. 2011, 274, Vecchione and Caprara 2009, Mondak 2010). Extraversion and openness have been associated with higher rates of participation, even though the relationships do not always reach conventional levels of statistical significance (Gerber 2011, 274). People scoring high on extraversion are presumed to enjoy advocating their preferences (Gerber et. al. 2011, 274), whereas respondents scoring high on openness are presumed to respond favorably to new experiences. Since conscientiousness is linked to an emphasis on personal duty and responsibility, Mondak and Halperin (2008, 343) expect that conscientiousness should be consistent with higher levels of political participation, while Gerber et al. (2011, 274) find that conscientiousness is associated with lower levels of participation. In contrast to sector cleavage voting, which comes with a directional hypothesis, the link between personality traits and political attitudes and behavior is less conclusive. Gerber et al. (2011, 271) point out that this research is still in its infancy and has not yet established a coherent theoretical framework to link personality traits to political attitudes and behavior. -7- Gerber et al. (2011, 269) argue that personality traits do not have a singular effect on political attitudes and behavior but mediate responses to the full range of stimuli that people encounter. In this respect, personality traits capture the basic dispositions of individuals to engage with their environments (Gerber et al. 2011, 269). This broad conceptualization of personality traits does not attribute every single trait to a specific political attitude or behavior. Following Mondak and Halperin (2008, 342ff.) and Schoen and Schumann (2007: 478ff.) we expect the following associations between personality traits and political behavior: (H2) i) Extraversion, openness and conscientiousness are positively associated with participation in elections. ii) Agreeableness and openness are positively associated with left-leaning political attitudes whereas conscientiousness is negatively associated with these attitudes. Bureaucratic Personality The third mechanism refers to the link between personality traits and sector affiliation. Given the specific recruitment rules, career paths and working conditions that tend to characterize government employment (Lewis and Frank 2002), these jobs could systematically attract certain types of personalities. The central question is: which personalities are attracted by government employment? Since Weber (1978) there have been attempts to describe “bureaucratic” personalities.1 The most persistent image of a “bureaucratic” personality in public opinion may be that of an overconforming (Merton 1940) and insecure (Thompson 1961) character. Merton (1940) regards “bureaucratic” personalities as persons who have an inherent need for constraints and regulation (see Cohen (1970) for a critical response). Elaborating on this idea, Thompson (1961) presents a -8- theory of “bureaupathology”, in which bureaucrats are conceptualized as alienated individuals who rely on conformity and rule abidance to overcome personal feelings of powerlessness and insecurity (DeHart-Davis 2007, 892). These attributes of the “bureaucratic” personality have been used to explain why leading government employees seek to exert an exorbitant amount of control over public policies. In Thompson’s (1961) account “bureaucratic” behavior becomes a pathological distortion of the Weberian bureaucracy (Bozeman and Rainey 1998, 167). In terms of dispositional personality traits, overconformity to rules and personal insecurity should correspond with high levels of conscientiousness and neuroticism. According to Thompson (1961) we should expect the following relationship: (H3i) Neuroticism and conscientiousness are positively associated with government employment. Despite the popularity of portraying bureaucrats as neurotic rule sticklers, there is remarkably little systematic research on the relationship between personality and government employment. Previous research on the “bureaucratic” personality focusing on rule-conformity does not support the dominance of rule-bound “bureaucratic” personalities in public organizations (Bozeman and Rainey 1998; Allinson 1984; Foster 1990). Bozeman and Rainey (1998) find that managers in private organizations are more likely to prefer more rules than managers in public agencies. DeHart-Davis (2007) presents the “unbureaucratic” personality as the mirror image of Thompson’s (1961) “pathological bureaucratic” personality. Unbureaucratic government employees are identified by their willingness to bend rules in order to improve citizen services. Exploring the empirical validity of the “unbureaucratic” personality on a sample of municipal employees in four US cities, DeHart-Davis (2007) finds that nonconformity and risk taking -9- increase unbureaucratic attitudes. Hence, in contrast to the “pathological” personality depicted in H3i, extraversion and openness rather than neuroticism and conscientiousness could be distinct traits of government employees’ personality. (H3ii) Extraversion and openness are positively associated with government employment. Confronted with these conflicting hypotheses on the relationship between personality traits and sector affiliation we could furthermore speculate whether the two depicted “bureaucratic personalities” apply to different types of government employees. In fact, Thompson’s (1961) conceptualization of a pathologic bureaucratic character focuses on administrative government employees, whereas DeHart-Davis (2007) tends to take a broader view on types of government employees. In terms of occupational differences within the group of government employees we could therefore speculate that H3i) applies more to government employees occupied with management and professional tasks, whereas H3ii) applies to government employees in service and production jobs. - Figure 1 - Sector Mediation – An Integrated Framework The conceptual model represented in Figure 1 suggests four relationships: The direct effect of government employment on political attitudes and behavior (H1), the direct effect of personality traits on political attitudes and behavior (H2) and the direct effect of personality traits on sector affiliation (H3). All three relationships have been presented as self-contained theoretical approaches. - 10 - In line with Mondak and Halperin (2008, 339), however, we expect that personality may not only correspond directly to variance in political attitudes and sectoral employment, but may also produce indirect effects. H1 and H3 are not mutually independent but can be put into a logical sequence. Personality traits affect political attitudes and behavior via its previous effect on sector affiliation. The mediation effect from personality traits via sector affiliation on political attitudes and behavior is our fourth hypothesis. It predicts that government employees’ political attitudes and behavior can be decomposed into two parts; one that is based on government employees’ occupational experiences and another which is based on “bureaucratic” personality traits. The sector mediation hypothesis seeks to moves beyond a mere description of sectorspecific voting patterns towards an explanation of these patterns. Given the already conflicting predictions on the relationship between personality traits and sector affiliation (H3i/ii), it is even harder to derive directional hypotheses on the mediation path from personality traits via sector affiliation towards political attitudes and behavior. Another issue that needs to be left to empirical exploration rather than a priori theorization, concerns the extent to which political attitudes and behavior are fully or partially mediated by sector affiliation. As represented in Figure 1 we start from the assumption of partial mediation. What already speaks in favor of partial mediation is the fact that not everybody whose dispositional traits ‘fit’ with government employment actually finds a job in the public sector. (H4) The effect of personality traits on government employees’ political attitudes and behavior is partially mediated by sector affiliation. Finally, the conceptual model assumes a direct relationship between socio-demographic control measures and personality traits. While there is growing evidence that the Big Five personality - 11 - traits have some genetic basis (e.g., Bouchard 1997) and are quite stable through the life cycle (Caspi, Roberts, and Shiner 2005), other scholars report systematic associations between demographic variables and personality traits (Goldberg, Sweeney, Merenda and Hughes 1998). In order to account for these associations we will start the empirical analysis with the assumption of a direct relationship between socio-demographic measures and personality traits. DATA AND METHOD The model is tested on data from the General Social Survey (GSS) for the year 2006. The GSS is a general population survey of residents of the United States conducted by the National Opinion Research Center at the University of Chicago. The sample covers the voting age population (18+). Since students, retirees and soldiers cannot be affiliated to any of the four sectors of occupational activity, they have been excluded from the sample. Endogenous Variables Electoral participation is measured with a binary variable whether or not the respondent voted in the last election. With respect to political attitudes, respondents have were asked which national political party they prefer; answer categories range from (1) “Strong republican” to (7) “Strong democrat”. Sector affiliation is constructed from two items: First, respondents were asked whether they regard themselves as working for (1) the government, (2) a private firm or whether (3) they are self-employed. In order to account for occupational differences within the group of government employees, we use the International Standard Classification of Occupations (ISCO88). We distinguish two large occupational groups: Government employees whose occupation falls into the first major ISCO-88 group (legislators, senior officials and managers) or the second (professionals) are labeled government employees in management and professional jobs. - 12 - Government employees whose occupation falls into any of the other major ISCO-88 groups (technicians, clerks, service workers, machine operators etc.) are labeled government employees in service and production jobs.2 The ISCO-88 is based on two concepts, the kind of tasks executed and the skills required to carry out these tasks. Hence, the two groups of government employees reflect differences in the occupational experiences (primarily high-skilled administrative tasks vs. service provision) as well as differences in the skill level of government employees. Eight out of ten ISCO-88 major groups have been related to four broad skill levels defined in terms of the International Standard Classification of Education (ISCED). Whereas the first ISCO-88 major group is not affiliated to any skill-level, professionals are coded to possess the highest skill level (ILO 2004). For example, government employment in management and professional jobs comprises occupations such as senior government officials, production and operations department managers or secondary education teaching professionals. Government employment in service and production jobs comprises occupations such as electronics fitters, secretaries or child-care workers. The resulting nominal variable capturing sector affiliation has four categories: (1) Government employees in management and professional jobs, (2) government employees in public service and production jobs, (3) private sector employees and (4) self-employed. As we are interested in whether government employees ought to be considered as a homogenous group, both, in terms of personality traits and political interests, private sector employees will serve as the reference group. Exogenous Variables The psychological literature has suggested various measures for the Big Five traits. Costa and McRae’s (1992) 240-item battery can be considered as the “gold standard” in measuring - 13 - personality traits (Muck, Hell and Gosling 2007, 166). Since this battery is too lengthy for general population surveys, researchers have suggested to measure personality traits with 60items (Costa and McRae 1992), 44-items (John and Srivastava 1999), 10-items (e.g. Gosling et al. 2003) and even 5-items (Woods and Hampson 2005). The GSS 2006 includes the 10-item battery constructed by Rammstedt and John (2007), the so-called BFI-10. In contrast to Gosling et al.’s (2003) Ten Item Personality Inventory (TIPI), which introduces new adjectival items based on a review of the existing Big Five instruments, Rammstedt and John (2007) selected two items for each dimension from the BFI-44 battery by Costa and McRae (1992). The 10-items are rated on a five-step scale ranging from “1= disagree strongly” to “5= agree strongly”. After recoding the reversed items (see Technical Appendix Table 1) the pairs of items measuring the same personality trait are summarized in five additive indices. We choose to explore the empirical validity of our explanatory framework on an US sample, since the direct effect of personality traits on political attitudes and behavior has already been tested on US samples using longer (e.g. Mondak et al. 2010) and shorter versions (e.g. Gerber et al. 2010) of the BFI. Thus, if we are able to reproduce these findings using the BFI-10 (Rammstedt and John 2007) from the GSS, we can be more confident in the instruments’ content validity. Furthermore, the path model includes two sets of control variables: age, gender, educational attainment and employment status, which are standard predictors in the individuallevel analysis of survey data. A second set of control measures is taken from the literature on sector cleavage voting (Jensen et al. 2009; Blais et al. 1990; Garand et al. 1991). Social class, religious attendance and urban background, which capture alternative political cleavages, might provide more meaningful explanations for individuals’ political attitudes and behavior than sector affiliation. Before the exogenous variables were entered into the path model they have - 14 - been tested for multicollinearity using the Variance Inflation Factor (VIF). The mean VIF for the full set of variables is 1.10 with a minimum of 1.02 and a maximum of 1.17, all of which are considered by Stine (1995, 55) and others (e.g. O’Brien 2007) as unproblematic values. Method The conceptual model presented in Figure 1 is examined with path analysis. Path analysis provides a method to test the interrelated hypotheses positioned in the conceptual model without conducting multiple estimations (Kline 2011, 103ff; Kaplan 2000). The operationalized model contains binary endogenous variables (sector dummies and turnout) and one ordinal endogenous variable (support for democrats). We thus use a probit model. The robust weighted least squares mean and variance adjusted (WLSMV) estimator implemented in Mplus 6 fits path models with any combination of dichotomous, ordinal or continuous outcome variables. WLSMV has two advantages over weighted least squares (WLS): First, it can deal with non-positive definite matrices by using a diagonal of the weight matrix and, second, it estimates robust standard errors (Muthén, du Toit and Spisic 1997; Muthén 2004, 19ff). Simulation studies by Flora and Curran (2004) report a generally positive performance of robust WLS estimation methods (also see Kline 2011, 181). Due to the adoption of the non-respondent, sub-sampling design, the GSS 2006 explicitly requires the use of weights (GSS 2011, 2110). The weight that is used in the path analysis (WTSS) takes into consideration the sub-sampling of non-respondents, the number of adults in the household, and essentially maintains the original sample size. The evaluation of the overall fit of the path model is based on three indicators (Kline 2011, 204ff.): the Root Mean Square Error of Approximation (RMSEA), the Comparative Fit Index (CFI), and the Weighted Root Mean Squared Residual (WRMR). Hu and Bentler (1999, 1) suggest that for the maximum likelihood method, a cutoff value equal or below 0.06 for the - 15 - RMSEA and a cutoff value equal or above 0.95 for the CFI are needed “before we can conclude that there is a relatively good fit between the hypothesized model and the data”. Yu and Muthén (2002) suggest that these heuristics are also reasonable with categorical outcomes with sample sizes above 250. According to Yu and Muthén (2002), the WRMR is better suited to assess the overall model fit if the path model is estimated by WLSMV (also see Muthén 2004, 23ff). They suggest that values for WRMR below 0.90 indicate good fit (Muthén 2004, 24, also see Yu 2002, 154ff). The fitted path model is represented in two path diagrams. Following Kline (2011, 161), the path diagrams report the unstandardized and the standardized path coefficients, which are interpreted just as regression coefficients in multiple regression (Kline 2011, 103). Once we have an appropriate overall model fit we apply a series of Chi-Square Difference Tests for model trimming (Muthén and Muthén 2010, 553). This is done by comparing the unconstrained model with a constrained model in which at least one path previously estimated freely is now constrained to equal zero (Kline 2011, 214). The Chi-Square Difference Test implemented in Mplus 6 is used to test the statistical significance of the decrement in overall fit as free parameters are eliminated. Missing data are excluded by listwise deletion.3 RESULTS Bivariate relationships Most respondents (68.9 percent, 779 obs.) say that they work in the private sector. Government employment is the second largest group. 8.6 percent (97 obs.) of the sample work for the government in management and professional occupations and 9.3 percent (105 obs.) work for the government in service and production jobs. The proportion of self-employed is 13.3 percent (150 obs.). Private sector workers serve as the reference category.4 - 16 - - Table 1 - The bivariate associations between personality traits, sector affiliation and political attitudes and behavior are summarized in Table 1. The top section of Table 1 presents average turnout rates and support for the Democratic Party measured in terms of deviations from turnout rates and support for democrats among private sector citizens. For the bivariate analysis the variable measuring party support has been dichotomized (support and strong support for democrats = 1, otherwise zero). Compared to their private sector counterparts, government employees in management and professional jobs show the highest plus in the turnout rate (plus 28.6 percentage points). Turnout rates for the other two groups (government employees in service and production jobs and self-employed) are just slightly higher than the average turnout rate for private sector employees (plus 15.3 to 16.2 percentage points). Concerning support for the democrats, government employees in service and production jobs show the strongest deviation (plus 13.9 percentage points). A negative deviation can be observed for the self-employed (minus 4.16 percentage points). Political attitudes of government employees in management and professional jobs hardly deviate from the average position of private sector employees (plus 2.02 percentage points). Apparently, the descriptive results support H1ii, but with an important refinement. It is government employees in management and professional jobs that show higher turnout rates, whereas it is government employees in service and production jobs that more strongly support the Democratic Party. The second section of Table 1 shows the relationship between personality traits, turnout and political orientation (H2). Cell entries represent the differences between voters and nonvoters (respectively supporters of the democrats and none supporters) in percentage points for - 17 - each of the five personality traits. Turnout is positively associated with higher levels of extraversion and negatively associated with higher levels of neuroticism. Support for democratic candidates is positively associated with higher levels of agreeableness and negatively associated with conscientiousness. However, none of these relationships is statistically significant and in substantive terms the corresponding values for Cramer’s V indicate weak associations. The bottom section of Table 1 reports the bivariate relationship between personality traits and sector affiliation (H3). For each of the three sectors, cell entries represent the differences in percentage points from the average personality traits score for private sector workers. Extraversion is particularly low among government employees in service and production jobs, whereas government employees in management und professional jobs show particularly low levels of agreeableness. The other three personality traits take extreme values for the selfemployed. These respondents combine higher levels of conscientiousness and particularly higher levels of openness with low levels of neuroticism. Again, none of the associations reaches statistical significance and the corresponding values for Cramer’s V are low. Fitting and Trimming of the Path Model The empirical model has been developed by applying the following steps: First, we fitted a path model that has the same structure as suggested by the conceptual framework (see Figure 1). The three measure of overall model fit, however, miss the suggested cutoff values: the RMSEA is 0.12 (90 Percent C.I. 0.10 to 0.13), the CFI is 0.67, and the WRMR is 1.32., indicating that the fit between the hypothesized model and the data can be substantially improved. Excluding the paths from the socio-demographic control variables to personality traits leads to a significant improvement in the overall model fit (RMSEA 0.04, CFI 0.9, WRMR 0.30). The second step of the trimming process involved the elimination of paths from social class, urbanization and - 18 - religious to the sector affiliation. The Chi-Square Test for Difference Testing remains insignificant (Chi-square (9) = 11.03, p = 0.27) if these paths are constrained to equal zero, suggesting to eliminate these paths. The third step of the trimming process concerns the question whether the effect of personality traits on political attitudes and behavior is partially or fully mediated by sector affiliation. In order to explore this question we also constrained the direct paths from personality traits to political attitudes and behavior to equal zero. This time, the ChiSquare Test for Difference Testing is statistically significant at the 5 percent level indicating that the additional elimination of these paths causes a significant decline in the overall model fit (ChiSquare (19) = 31.21, p = 0.04). From that we conclude that partial mediation provides a more appropriate description of the dependencies among the set of variables than full mediation. Figure 2 presents the unstandardized and standardized path coefficients for the fitted path model on turnout and political orientation. In order to keep the graphical representation of the path diagram manageable the full estimation results including disturbances are summarized in Appendix Table 3. The Chi-Square Test of Model Fit for the Baseline Model, which compares the final path model to the null model, is statistically at the highest margin (Chi-Square (70) = 395.86, p = 0.00). The three indicators accounting for the overall model fit indicate an acceptable model fit. The trimmed path model has a RMSEA of 0.02 (90 Percent C.I. 0.00 to 0.04) a CFI of 0.98 and a WRMR of 0.47. - Figure 2 - Direct effects Before we discuss findings on H1, H2 and H3 we briefly describe the direct effects of the control variables (see Appendix Table 3). The elderly, people reporting higher level of religious - 19 - attendance, and higher educated respondents are more likely to vote, whereas respondents in urban regions are less likely to vote. With respect to support for the Democratic Party the path coefficients can be summarized as follows: Respondents reporting high levels of religious attendance are less likely to support the democrats, whereas the elderly are more likely to do so. These patterns are in line with prior research on electoral participation and are consistent with prior research on the individual determinants of political ideology (e.g. Blais et al. 1990; Jensen et al. 2009). Sector-cleavage voting (H1): In line with the bivariate findings government employees in management and professional jobs are more likely to vote but they are not more likely to support the democrats, as compared to private sector employees. Government employees in service and production jobs are more likely to vote than private sector employees, and they are also more likely to support the Democratic Party. This pattern refines prior evidence on sector cleavage voting (e.g. Jensen et al. 2009; Garand et. al. 1991). In contrast to the BVM, which assumes government employees to behave as a homogenous interest group, the path model suggests that occupation-specific experiences matter for government employees’ political attitudes. Moreover, from the cleavage voting literature we would expect that government employees and self-employed hold diametrically opposed political views. Even though selfemployment has no effect on turnout, the negative and statistically significant association between self-employment and support for democrats tends to support this expectation. Personality traits based voting (H2): None of the five traits exerts a statistically significant effect on turnout. The negative effect of conscientiousness on turnout (p-value 0.11) and, to a lesser extent, on support for democrats (p-value 0.15), however, only marginally fails the conventional threshold. These weak but stable findings are in line previous studies. Gerber et al. (2011, 220) also find a significant negative association between conscientiousness and both - 20 - turnout as well as support for democratic candidates. Mondak et al. (2010, 23) also report a negative and significant association between conscientiousness and turnout. Mondak et al. (2008, 352) and Gerber et al. (2010, 120) report a negative and significant association between conscientiousness and liberal political ideology. The positive and statistically significant effect of openness on support for the Democratic Party also supports prior finding on personality traits based voting (Mondak et al. 2008, 352; Gerber et al. 2010, 120, Gerber et al. 2011, 270) and lends tentative support towards H2ii. Bureaucratic Personality (H3): With respect to government employees in management and professional jobs, none of the five variables measuring personality traits exert a statistically significant effect. This non-finding can be theoretically insightful as it suggests that the personality profile of high-skilled government employees does not significantly differ from the average personality profile of private sector citizens. Hence, for this group of government employees we find no evidence in favor of a distinct “bureaucratic” personality. This picture slightly changes with respect to government employees in service and production jobs. Higher levels of extraversion are negatively associated with government employees in service and production jobs. Even though the association is statistically significant at the lowest conventional level, the standardized path coefficient indicates a reasonable impact compared to the impact of control measures (see Appendix Table 3). Extraversion has been linked to the pursuit of excitement and higher willingness to take risks (Roccas et al. 2002). In this respect the negative association between extraversion and government employees in service and production jobs tilts tentative evidence in the direction of a reclusive public employee. This observation, however, needs to be interpreted carefully. Among the set of regressions nested in the path model, the model explaining government employment in service and production jobs has the lowest model fit (see Appendix Table 3). - 21 - An interesting side finding is the impact of personality traits on self-employment. Compared to private sector employees, self-employment is associated with higher levels of openness. Openness has been related to nonconformity and innovation (Roccas et al. 2002). These qualities might be particularly helpful for entrepreneurial activities. Even though it would go far beyond the scope of this preliminary analysis to conclude that openness constitute entrepreneur personalities, it seems plausible that this trait could be beneficial for entrepreneurs in competitive market economies. - Table 2 - Indirect effects Our fourth hypothesis predicts that personality traits affect political attitudes and behavior via their prior effect on sector affiliation (H4). In terms of path analysis it presumes an indirect effect from personality traits on political behavior and attitudes via sector affiliation. Since Figure 2 reveals that only two personality traits – extraversion and openness – have significant effects on sector affiliation, we explore the indirect effects of these traits on political attitudes and behavior in further detail (see Table 2). Indirect effects are calculated as the product of the direct effects, either standardized or unstandardized (Kline 2011, 164). The interpretation of the resulting mediation path coefficients is the same as for the direct path coefficients. The path from extraversion to vote is mediated by government employment in service and production jobs. The specific standardized indirect effect is -0.12 x 0.11 = -0.01. The result -0.01 says that turnout is expected to decrease by about 0.01 standard deviations for every increase in extraversion of one full standard deviation via its prior effect on sector affiliation. Since the coefficients for indirect effects can have complex - 22 - distributions it can be difficult to estimate their standard errors. The Sobel Test provides approximated standard errors (Kline 2011, 165). MacKinnon (2008) and MacKinnon, Lockwood, Hoffman, West and Sheets (2002) suggest to use bootstrapping methods to obtain standard errors for indirect effects. Estimating bootstrapped standard errors with 2500 repetitions indicates that the indirect effect from extraversion to vote via government employment in service and production jobs is statistically significant at the 10 percent level. The total indirect effect of extraversion on support for the Democratic Party (second section of Table 2) is substantively small and statically significant at the lowest margin. The total indirect effect, however, appears to be driven by the specific indirect effect from extraversion via government employment in service and production jobs on support for democrats. The standardized mediation coefficient for that path says that support for the Democratic Party is expected to decrease by about 0.02 standard deviations for every increase in extraversion of one full standard deviation via its prior effect on sector affiliation. Hence, if government employees in service and production jobs were not characterized by low levels of extraversion, the positive association between this group of employees and support for the Democratic Party would have been even slightly stronger. The second personality trait that matters for sector affiliation is openness, which has a positive direct effect on self-employment. The path decomposition shows that openness has no direct and no indirect effect on turnout; all mediation path coefficients are statistically insignificant (third section of Table 2). However, there is some evidence that self-employment mediates the effect of openness on support for the Democratic Party. The total indirect effect of openness on support for democrats is driven by the specific indirect path via self-employment (fourth section of Table 2). The standardized mediation coefficient for the specific indirect path says that support for the Democratic Party is expected to decrease by about 0.03 standard - 23 - deviations for every increase in extraversion of one full standard deviation via its prior effect on self-employment. Hence, the negative association between self-employment and support for the democrats would have been stronger if self-employees were not characterized by high levels of openness. DISCUSSION In order to explain why government employees’ political attitudes and behavior differs from private sector citizens, this study presents a theoretical framework that focuses on the interplay between government employees’ personality traits and occupational experiences in shaping their political preferences. Findings from the path model advance our understanding of government employees’ political preference formation in four ways: First, instead of considering government employees as homogenous bloc of voters this study points out the relevance of occupational experiences for government employees to develop common political interests. A simple public/private dichotomy conceals the variance of political attitudes within the government workforce (H1i/ii). Disaggregating government employees by their skill level and occupation reveals that the positive association between government employment and support for left-wing parties, which has been reported early (e.g. Jensen et al. 2009; Wise and Szücs 1996; Blais et al. 1990; Garand et al. 1991), stems from government employees in service and production jobs, whereas government employees occupied with management and professional tasks do not differ in their political attitudes from the rest of the population. Second, even though findings on personality traits based voting are mixed with respect to the theoretical expectations put forward by Mondak and Halperin (2008, 342ff.) and Schoen and Schumann (2007: 478ff.), the path model has been able to replicate findings from prior studies - 24 - which relied on alternative item batteries for measuring the Big Five personality traits (Mondak et al. 2008, 352; Gerber et al. 2010, 120). Overall, these findings support the assumption that the personality concept can provide a unique explanatory factor in political behavior and individual voting patterns. Third, the direct relationship between personality traits and sector affiliation shows that we can hardly assume a homogenous “bureaucratic” personality neither in the spirit of Merton’s (1940) and Thompson’s (1961) overconforming and timid bureaucrat nor in the spirit of an proactive government employee (DeHart-Davis 2007). In this respect, the concept of a unified bureaucratic personality needs to be qualified as an outdated myth. If anything, the observation that government employees in service and production jobs show slightly lower levels of extraversion than private sector citizens constitutes some weak evidence in favor of the proposition of a reclusive public employee. Findings on openness suggest that there could be a selection bias in government recruitment, as this personality trait, which has been associated with entrepreneurial attitudes, is underrepresented in the government workforce. Fourth, there is equally weak evidence for an indirect effect from personality traits on government employees’ political orientation. Even though personality traits affect political attitudes and behavior via its previous effect on sector affiliation – namely self-employment and government employees in service and production jobs – the specific indirect effects are rather small (H4). This observation corroborates the conclusion that government employees’ experiences in the occupational world are more influential determinants of their political attitudes and behavior than inherited personality traits. The empirical analysis is certainly limited in at least two ways. First, the four employment groups are of very different sizes. Such dummy-coded predictors with unequal group sizes reduce the power of significance tests and may partially explain the weak statistical - 25 - associations. Second, as shown by Rammsted and John (2007, 203), we would probably detect stronger relationships between personality traits, sector affiliation and political orientation with a larger instrument than the BFI-10. Both aspects, which are due to the limited availability of detailed BFI and sector employment measures in population surveys, need to be considered in putting the path model into perspective. The conceptual model presented in this study would certainly benefit from further rigorous theoretical and empirical exploration. First, tasks of the public sector, administrative cultures, and employment conditions therein vary considerably across countries (Painter and Peters 2010, Tepe, Gottschall and Kittel 2010). Further research might focus on how these national contexts condition the interplay between personality traits, government employment and political orientation. Second, this study uses the BVM, which stems from the rational choice literature, as the theoretical reference point to conceptualize a refined model of government employees’ political preference formation. The Public Service Motivation framework (e.g. Wright 2001), departs from the assumption of economically self-interested agents. These scholars consider government employees to be characterized by “attitudes that go beyond selfinterest and organizational interest, that concern the interest of a larger political entity and that motivate individuals to act accordingly whenever appropriate” (Vandenabeele 2007, 549). Further research might therefore address whether such pro-social and communal orientations exist among government employees and whether these orientations can be traced back to certain personality traits. We expect that all these extensions will make it even more difficult to identify a homogenous and internally consistent “bureaucratic personality”. - 26 - ENDNOTES 1 Weber (1978) treats impersonality as a distinctive feature of the recruitment process in the civil service. Downs (1967) provides a whole typology of bureaucratic characters (distinguishing climbers, conservers, zealots, advocates and statesmen), which Dunleavy (1991, 168) condemns as “venturing into amateur social psychology”. 2 The Erikson-Goldthorpe (EGP) class scheme might have been an even more adequate measure to capture occupational experiences. The use of this scheme, however, resulted in very low numbers of observation per class and has therefore not been considered in this analysis. 3 The GSS (2006) dataset, the Stata command files and Mplus command files are available for replication purposes. 4 The GSS contributes to the International Social Survey Program (ISSP). 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Conceptual framework Bu re au cr ( at H3) ic Pe rs on al ity v 1) e (H vag a le rc to c Se g in ot Note: Dotted lines represent the effect of control variables. Table 1. Bivariate relationship Gov. Man. & Prof. Gov. Serv. & Prod. Self-employed Cramers' V (compared to private sector employees) Turnout 28.6 15.3 16.2 0.19*** Left 2.02 13.9 -4.16 0.10** Vote Left (compared to (compared to Cramers' V Cramers' V none-vote) none-left) Extraversion 2.15 0.09 -0.38 0.08 Agreeableness 1.79 0.06 1.25 0.08 Conscientiousness -0.03 0.05 -1.47 0.07 Openness 0.82 0.09 0.07 0.09 Neuroticism -2.36 0.09 0.61 0.07 Gov. Man. & Prof. Gov. Serv. & Prod. Self-employed Cramers' V (compared to private sector employees) Extraversion 2.71 -3.40 1.25 0.09 Agreeableness -2.02 1.74 0.72 0.09 Conscientiousness 0.38 1.46 2.72 0.07 Openness 3.26 -0.46 7.27 0.09 Neuroticism 2.05 -2.54 -4.14 0.10 Note: Cramer’s V range from 0-1, * p<0,10, ** p<0,05, *** p<0,01 Pearson Chi-Square Test, Turnout, left and personality traits have been scales to range from 0 to 100. Values in cells represent differences to the mean responses of private sector citizens. - 32 - Figure 2. Path model -0 .0 7 * 0 0.0 0.0 4 0 -0. 0. 00 10 0. 3 00 -0 .0 2 0. -0 .1 2 0 0.0 0.0 6 0 -0. 0. 00 09 0. 4 00 -0 . 04 0. Note: Number of observations: 1131 (using sampling weights), Number of endogenous variables: 5, Number of exogenous variables: 12, WLSMV estimator, regressions include control variables for age, gender, highest level of education, subjective social class, urbanization, religious attendance and employment status. Full estimation results including disturbance variances represented in Appendix Table 3., RMSEA = 0.02 (90% C.I. 0.00, 0.04), CFI = 0.98, WRMR = 0.47, * p<0,10, ** p<0,05, *** p<0,01 - 33 - Table 2. Decomposition of indirect effects Exogenous Variable Decomposition Endogenous variable Unst. Vote S.E. St. 0.032 -0.005 0.036 0.027 0.010 0.028 0.045 -0.007 0.051 -0.009* -0.012 Unst. 0.007 Left S.E. 0.004 -0.013* 0.017 0.02 0.009 0.021 0.006 -0.022 0.028 -0.010** -0.016 Unst. 0.006 Vote S.E. -0.017 0.008 -0.025 0.026 0.012 0.028 -0.023 0.011 -0.034 0.01 0.009 Left S.E. 0.013 Extraversion Total Total indirect Direct Specific indirect via Gov. service & production St. Extraversion Total Total indirect Direct Specific indirect via Gov. service & production St. Openness Total Total indirect Direct Specific indirect via Self-employed Unst. St. Openness Total 0.052** 0.019 0.085 Total indirect -0.021** 0.010 -0.035 Direct 0.074*** 0.021 0.119 Specific indirect via Self-employed -0.017*** 0.008 -0.028 Note: Unst. = unstandardized, St. = standardized, Bootstrapped with 2500 repetitions, *p<0,10, ** p<0,05, *** p<0,01. - 34 - Appendix Table 1. Definition and coding of variables Name Endogenous variables Vote Left Definition and coding Sector affiliation Did you vote in last election? Yes=1, No=0 Party affiliation: (1) Strong republican (2) Not very strong republicans (3) Independent, close to republicans (4) Independent (5) Independent, close to democrats (6) Not very strong democrat (7) Strong democrat Working for private versus public sector? (1) Government manager & professionals [Government employees in ISCO88 Major Group 1 or 2, soldiers excluded], (2) Government service & production [Government employees not in ISCO88 Major Group 1 or 2, soldiers excluded], (3) Private sector employment (4) Self-employed. Personality traits (TIPI-G) - Conscientiousness - Extraversion - Openness - Agreeableness - Neuroticism I see myself as someone who … (1 to 5 scale) ... does a thorough job, ... tends to be lazy (R) ... is outgoing, sociable, … is reserved (R) ... has an active imagination, ... has few artistic interests (R) ... is generally trusting, ...tends to find fault with others (R) ... gets nervous easily, ... is relaxed, handles stress well (R) Control variables Age Female Education Respondent’s age in years Gender Highest education level / degree from no formal qualification (1) to university degree (6) Social class Top-bottom self-placement on a 10 point scale, measured as deviation from the country mean response Urbanization Type of community from rural (1) to city (5) Employment status Unemployed and other non-working (housewife, home duties, helping family member), Reference category: Employed (full- and part-time employed) Religious attendance Attendance of religious services: Ranges from (1) Never to (8) Several times a week Note: R = reversed; Age, Degree, Class, Urbanization and the BFI Personality traits have been zstandardized in order to compare within model effect sizes. Dataset: General Social Survey (GSS) 2006, Dataset (ZA4350_F1.dta), Stata command files and Mplus command files are available for replication purposes. - 35 - Appendix Table 2. Summary statistics Variable Political behavior and attitudes Vote (Dummy) Left Production sector affiliation Gov. Manager & prof. (Dummy) Gov. Service & production (Dummy) Private sector employee (Dummy) Self-employed (Dummy) Personality traits (Big5) Extraversion Agreeableness Conscientiousness Openness Neuroticism Individual control. measures Age Female (Dummy) Highest edu. Degree Subjective social class Urbanization None-working (Dummy) Religious attendance Note: Number of observation 1131. Mean Std. Dev. Min Max 0.67 4.24 0.47 1.89 0 1 1 7 0.09 0.09 0.69 0.13 0.28 0.29 0.46 0.34 0 0 0 0 1 1 1 1 6.65 7.49 8.55 7.27 4.90 1.72 1.45 1.19 1.64 1.79 2 2 4 2 2 10 10 10 10 10 43.46 0.52 4.61 4.48 4.30 0.19 4.27 12.87 0.50 1.16 1.85 0.79 0.39 2.40 18 0 1 1 3 0 1 89 1 6 10 5 1 8 - 36 - Appendix Table 3. Path model (full estimation results) Unst. S.E. p-values St. Dist. Var. est. R squared 0.34 Vote Gov. Man. & Prof. 0.14** 0.07 0.05 0.15 Gov. Serv. & Prod. 0.13* 0.07 0.09 0.11 Self-employed 0.10 0.07 0.17 0.09 Conscientiousness -0.07 0.05 0.11 -0.07 Extraversion 0.04 0.03 0.22 0.05 Openness -0.03 0.03 0.45 -0.03 Agreeableness 0.03 0.03 0.37 0.04 Neuroticism -0.03 0.03 0.26 -0.05 Age 0.02*** 0.00 0.00 0.23 Female -0.04 0.11 0.68 -0.02 Education 0.36*** 0.06 0.00 0.34 Social class -0.03 0.03 0.26 -0.04 Urbanization -0.10* 0.06 0.10 -0.07 None working 0.08 0.13 0.51 0.03 Religious 0.07*** 0.02 0.00 0.13 Left 0.09 Gov. Man. & Prof. 0.00 0.06 0.98 0.00 Gov. Serv. & Prod. 0.14** 0.05 0.01 0.14 Self-employed -0.18*** 0.05 0.00 -0.19 Conscientiousness -0.05 0.03 0.15 -0.06 Extraversion 0.02 0.02 0.44 0.03 Openness 0.07*** 0.02 0.00 0.12 Agreeableness 0.02 0.03 0.52 0.02 Neuroticism 0.00 0.02 0.89 0.01 Age 0.01*** 0.00 0.00 0.12 Female 0.06 0.08 0.45 0.03 Education -0.06 0.05 0.25 -0.06 Social class 0.02 0.02 0.44 0.03 Urbanization 0.06 0.04 0.16 0.05 None working 0.05 0.11 0.63 0.02 Religious -0.05*** 0.02 0.00 -0.12 Vote Left 0.00 0.05 0.93 0.00 Note: Unst. = unstandardized, St. = standardized, Dist. Var. = Disturbance variances represented as estimated R-squares (Muthén 2004, 3), Table continues on next page. - 37 - Appendix Table 3 continued. Path model (full estimation results) Unst. S.E. p-values St. Dist. Var. est. R squared 0.35 Gov. Man. & Prof. Conscientiousness 0.00 0.06 0.99 0.00 Extraversion 0.01 0.04 0.75 0.02 Openness 0.01 0.05 0.79 0.02 Agreeableness -0.07 0.06 0.22 -0.08 Neuroticism 0.05 0.04 0.26 0.07 Age 0.00 0.01 0.95 0.00 Female 0.45*** 0.16 0.00 0.18 Education 0.61*** 0.06 0.00 0.55 None working -0.12 0.19 0.54 -0.04 Gov. Serv. & Prod. 0.04 Conscientiousness 0.00 0.06 0.98 0.00 Extraversion -0.07* 0.04 0.08 -0.12 Openness -0.03 0.04 0.43 -0.05 Agreeableness 0.04 0.05 0.37 0.06 Neuroticism -0.02 0.04 0.61 -0.04 Age 0.00 0.01 0.72 0.02 Female 0.05 0.13 0.72 0.02 Education 0.05 0.07 0.45 0.05 None working -0.32* 0.18 0.07 -0.12 Self-employed 0.15 Conscientiousness 0.00 0.05 0.96 0.00 Extraversion 0.02 0.04 0.58 0.03 Openness 0.10*** 0.03 0.00 0.15 Agreeableness -0.01 0.04 0.87 -0.01 Neuroticism -0.03 0.03 0.46 -0.04 Age 0.02*** 0.01 0.00 0.28 Female -0.20* 0.12 0.10 -0.09 Education 0.07 0.05 0.12 0.07 None working -0.45** 0.16 0.01 -0.16 Note: Unst. = unstandardized, St. = standardized, Dist. Var. = Disturbance variances represented as estimated R-squares (Muthén 2004, 3), Number of observations: 1131 (using sampling weights), RMSEA = 0.02 (90% C.I. 0.00, 0.04), CFI = 0.98, WRMR = 0.47, * p<0,10, ** p<0,05, *** p<0,01. - 38 - Technical Online Appendix on the BFI-10 This appendix provides further information on the BFI-10 (Rammsted and John 2007). Table 1 shows that the pairwise correlation of those items measuring the same dimension is positive and statistically significant in all five cases. Cronbachs Alphas are below that cutoff heuristic for each trait dimension. Similar to Muck et al. (2007, 169), we furthermore observe statistically significant but substantially low pairwise correlations (average pairwise correlation = 0.14). Finally, we have run a Confirmatory Factor Analysis (CFA) on the BFI-10, even though Kline (2011, 358) and others (e.g. Marsh, Hau, Balla and Grayson 1998, 182) recommend at least three indicators per factor. Models with an insufficient number of indicators are prone to estimation problems. This presumption is confirmed with respect to the BFI-10. Running the CFA with five factors (each factor represents one of the five personality traits) results in a Heywood case (negative variance estimate; Kline 2011, 158). The construct validation of the short BFI instruments has been the subject of indepth studies (e.g. Muck et al. 2007, Rammstedt and John 2007, Gerber et al. 2011). According to these authors the usual procedures to measure construct validity (e.g. Cronbach’s Alpha or Confirmatory Factor Analysis) are misleading with respect to short BFI instruments. Short BFI instruments are designed with the purpose to measure very broad domains with only two items per dimension, using items at both poles of the five personality dimensions (Gosling 2011). The primary goal of the short BFI instruments is to create a item battery that optimizes content validity (Gosling 2011). Thus, we cannot expect that the BFI-10 fulfills the demands for construct validity we would apply to larger instruments. - 39 - The content validity of the TIPI and BFI-10 has been explored by Muck et al. (2007), Rammstedt and John (2007) and Gerber et al. (2011). Inter alia, content validity requires convergence between personality trait scales measured by item batteries of different length. Rammsted and John (2007, 206) show find that although the BFI-10 scales include less than 25 percent of the full 44-items BFI by John and Srivastava (1999), they predict almost 70 percent of the variance of the full scales. Based on these tests, Rammsted and John (2007, 203) conclude that the BFI-10 “yields effect sizes that were lower than those for the full BFI-44 but still sufficient for research settings with truly limited time constraints”. Online Appendix Table 1. BFI-10 items and additive index correlations Dimension Item Extraversion Agreeableness Conscientiousness Neuroticism Openness Dimension Extraversion Agreeableness Conscientiousness Neuroticism Openness Mean Std. R is outgoing, socialable R is reserved (re.) R is generally trusting R tends to fault with others (re.) R tends to be lazy (re.) R does a thorough job R get nervous easily R is relaxed (re.) R has artistic interest R has an active imagination 3.96 2.68 4.11 3.38 4.10 4.45 2.54 2.36 3.31 3.96 0.95 1.15 0.88 1.04 0.91 0.57 1.11 1.05 1.17 0.93 Average interitem covariance 0.32 0.15 0.25 0.37 0.20 Number of items in scale 2 2 2 2 2 Scale reliability coefficient 0.49 0.26 0.40 0.54 0.34 Additive Indices Pairw. correlation Pairw. corr. Pairw. corr. Extraversion Agreeableness Conscientious. Agreeableness 0.12 (0.00) Conscientiousness 0.07 0.25 (0.01) (0.00) Neuroticism -0.14 -0.20 -0.23 (0.00) (0.00) (0.00) Openness 0.15 0.05 0.10 (0.00) (0.13) (0.00) Note: R = Respondent, re. = Item reversed, p-values of pairwise correlation in parenthesis. - 40 - Pairwise correlation 0.32 (0.00) 0.15 (0.00) 0.25 (0.00) 0.37 (0.00) 0.20 (0.00) Pairw. corr. Neuroticism -0.13 (0.00)
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