A Three-Factor Model of Trait Anger: Dimensions of Affect, Behavior, and Cognition René Martin David Watson University of Iowa Choi K. Wan Centers for Disease Control and Prevention ABSTRACT The structure of trait anger was tested in a study of 24 self-report scales. Exploratory factor analyses in an undergraduate sample (N = 457) yielded a two-factor model (comprising cynicism and aggression) and a threefactor model (representing angry emotions, aggressive behaviors, and cynicism). Subsequent evaluations, including confirmatory factor analyses, indicated that the three-factor model provided the best characterization of the trait anger domain. The three-factor solution was consistent with an “ABC” René Martin and David Watson, Department of Psychology, the University of Iowa. Choi K. Wan, Division of HIV/AIDS Prevention, Centers for Disease Control and Prevention. This research is based in part on René Martin’s doctoral dissertation submitted to the University of Iowa. Portions of this article were presented at the Nags Head Conference on Personality and Social Behavior, June 18, 1996. This research was supported, in part, by NIH Grant HL46448. We wish to thank Alan Christensen, Lee Anna Clark, Thomas Rocklin, Jacob Sines, and Jerry Suls for their comments on a previous version of this article. Correspondence should be addressed to René Martin, Department of Psychology, 11 Seashore Hall E, University of Iowa, Iowa City, Iowa 52242; e-mail: rene-martin @uiowa.edu Journal of Personality 68:5, October 2000. Copyright © 2000 by Blackwell Publishers, 350 Main Street, Malden, MA 02148, USA, and 108 Cowley Road, Oxford, OX4 1JF, UK. 870 Martin et al. conceptualization of trait anger, consisting of the dimensions of affect, behavior, and cognition. The three factors showed strikingly different associations with the Big Five personality traits. Angry Affect was most strongly related to Neuroticism, whereas Behavioral Aggression was associated with low Agreeableness. Cynical Cognition represented a blend of neurotic and disagreeable characteristics. Modest mean-level differences were observed between the genders for each factor. Trait anger and related constructs have enjoyed considerable attention from personality and social psychologists in recent years. For example, 65 articles addressing anger, aggression, or cynicism appeared in the Journal of Personality and the Journal of Personality and Social Psychology in the decade spanning 1988 to 1998. Moreover, anger and aggression scales are included in many popular omnibus personality inventories, such as the Revised NEO Inventory (Costa & McCrae, 1992), the Personality Research Form (Jackson, 1984), the Schedule for Nonadaptive and Adaptive Personality (Clark, 1993), and the Multidimensional Personality Questionnaire (Tellegen, in press). Despite widespread interest in the consequences of trait anger (e.g., King, 1997; Martin et al., 1999; Miller, Smith, Turner, Guijarro, & Hallet, 1996; Smith, 1992; Suls, Wan, & Costa, 1995), discussions of anger and related dimensions typically begin with definitional caveats (e.g., Biaggio & Maiuro, 1985; Smith, 1992; Spielberger, Jacobs, Russell, & Crane, 1983). The complexities in operationalizing anger are so extreme that Bandura (1973) referred to the domain as a “semantic jungle” (p. 2). Recent definitional attempts, however, consistently have included three constructs: anger, hostility, and aggression. For example, Spielberger and associates (Spielberger, Johnson, Russell, Crane, Jacobs, & Worden, 1985) referred to anger, hostility, and aggression together as the “AHA! syndrome” (p. 7). Buss and Perry (1992) also provided a definition of aggression that incorporated both angry emotions and hostile attitudes. Finally, Barefoot (1992) defined hostility in terms of interrelated elements of cynical beliefs and attributions, angry emotional states, and aggressive or antagonistic behaviors. As used by psychologists, the term “anger” usually refers to affective experience, ranging in intensity from mild annoyance to fury and outrage (Barefoot, 1992; Buss, 1961; Spielberger et al., 1983). “Hostility” typically characterizes cognitive elements such as attitudes and beliefs; more specifically, the term “hostility” generally reflects a person’s tendency to Trait Anger ABCs 871 view the world in a negative, cynical fashion (e.g., Barefoot, 1992; Buss, 1961; Buss & Perry, 1992; Spielberger et al., 1983). Whereas anger is used to describe the experience of an emotional state that is primarily intrapersonal, hostility is distinctly “other-directed” and centers on the relational implications of trait anger. Finally, the term “aggression” consistently is used to describe behavior (Bandura, 1973; Barefoot, 1992; Baron, 1977; Berkowitz, 1962; Buss, 1961; Geen, 1990). Aggressive behavior may be precipitated by anger, but it may be motivated by many other factors as well. These definitions suggest that anger, hostility, and aggression describe related, but distinct domains. Unfortunately, the terms often are used interchangeably and without clear operationalizations. The subsequent confusion makes it difficult to identify precisely what is assessed by various self-report measures of anger and hostility. For example, the same questionnaires that are identified as measures of anger and hostility by some researchers (e.g., Biaggio & Maiuro, 1985; Matthews, Jamison, & Cottington, 1985) also are described as measures of aggression by others (e.g., Edmunds & Kendrick, 1980; Megargee & Menzies, 1971). The conceptual ambiguity surrounding these constructs makes it problematic to draw meaningful conclusions about the social and health consequences of anger, hostility, and aggression. We propose that the distinctions among anger, hostility, and aggression are critical in understanding three unique dimensions assessed by selfreport measures of trait anger. Anger corresponds to affect, aggression to behavior, and hostility (or cynicism) to cognition. Together the three constructs form a three-factor “ABC” model of trait anger. The conceptualization of mental activity in terms of affect, behavior, and cognition has a long history in both philosophy and psychology. For example, Hilgard (1980) reviewed the role of a taxonomy comprising cognition, affection, and conation in the history of psychology. McGuire (1969) also emphasized the distinctions among affect, cognition, and conation, which he operationalized as overt behavior. We believe that an ABC perspective can lend clarity to the trait anger domain. Anger-related emotions, behaviors, and cognitions are likely to be interrelated; however, it is reasonable to expect these dimensions to be separable. For example, not every angry person (affective dimension) resorts to shouts or physical violence (behavioral dimension). Similarly, one might hold cynical interpersonal expectations (cognitive dimension) without feeling angry. The ABC model is detailed enough to facilitate understanding and 872 Martin et al. provide predictive specificity in the trait anger domain. The approach is not so elaborate, however, as to become unwieldy. We now review prior factor analyses of trait anger measures, which provide some preliminary support for an ABC model of trait anger. Prior Factor Analytic Studies of Trait Anger Measures Several factor analytic studies of the Buss-Durkee Hostility Inventory (BDHI) have yielded a two-factor model reflecting the components of anger experience and anger expression (Bendig, 1962; Bushman, Cooper, & Lemke, 1991; Buss & Durkee, 1957; Edmunds & Kendrick, 1980; Sarason, 1961). Costa, McCrae, and Dembroski (1989) also found support for the anger experience and anger expression dimensions in an item-level factor analysis that included questions extracted from the Anger Self-Report (ASR; Zelin, Adler, & Myerson, 1972), Multidimensional Anger Inventory (MAI; Siegel, 1986), State-Trait Anger Scale (Spielberger et al., 1983), and BDHI. Musante, MacDougall, Dembroski, and Costa (1989) obtained similar results in a scale-level factor analysis of the ASR, BDHI, MAI, and the Anger Inventory (Novaco, 1975). Whereas factor analytic studies featuring the BDHI consistently have yielded components of anger expression and anger experience, the Cook and Medley Hostility Scale (Ho Scale; Cook & Medley, 1954) seems to measure a rather different aspect of trait anger. Costa, Zonderman, McCrae, and Williams (1986) extracted two factors from the Ho Scale. The first factor, “Cynicism,” reflected a negative outlook on the world and other people and the second factor, “Paranoid Alienation,” was marked by items describing feelings of persecution and emotional isolation. As previously described, Musante et al. (1989) found support for the anger experience–anger expression model. Their report, however, included a discussion of a three-factor solution that ultimately was rejected as incompatible with their theoretical presentation. The third factor of the rejected solution focused on interpersonal attitudes and feelings of suspicion, guilt, and mistrust. This hostile attitude factor appears to be conceptually similar to the cynicism component measured by the Ho Scale, and suggests that other trait anger questionnaires also may measure anger-related cognitions, in addition to anger expression and anger experience. Trait Anger ABCs 873 Finally, some factor analyses have included trait anger questionnaires with inventories measuring potentially related constructs, such as the Type A behavior pattern and hardiness (Friedman, Tucker, & Reise, 1995; Miller, Jenkins, Kaplan, & Salonen, 1995). In confirmatory factor analyses that combined the Anger Expression (AX) scale (Spielberger et al., 1985), a brief version of the MAI, a short form of the Ho Scale, and a selection of hostility-related items from several Type A behavior scales, Miller et al. (1995) obtained eight scales (Anger-out, Anger Control, Anger Frequency, Ease of Anger Provocation, Brooding, Hostile Outlook, Cynicism, and Sulleness). These results are somewhat difficult to interpret, however. Several scales were substantially interrelated, indicating that they probably reflected a smaller number of underlying higherorder dimensions. In addition, a small group of trait anger measures was used. These measures, which were selected for their potential to predict cardiovascular disease, may not have represented the trait anger domain adequately. Friedman et al. (1995) included four trait anger measures—Ho Scale, BDHI, State-Trait Anger Scale, and AX—in exploratory factor analyses of personality scales selected for their relevance to health. Measures of Type A behavior, anxiety, depression, optimism, and hardiness also were used, as well as the Eysenck Personality Questionnaire (Eysenck & Eysenck, 1975). Five factors were obtained: Neuroticism, Anger-out, Alienation-Suspicion, Introversion, and Conscientiousness. The Angerout factor was similar to the anger expression component obtained in factor analyses featuring the BDHI (Bendig, 1962; Bushman et al., 1991; Buss & Durkee, 1957; Costa et al., 1989; Musante et al., 1989). The Alienation-Suspicion factor was marked by the Ho Scale; this factor appeared to approximate the cynicism component observed in previous studies (Costa et al., 1986; Musante et al., 1989). Anger experience did not emerge as a discrete factor in Friedman et al.’s study; however, scales related to the experience of angry emotions (e.g., BDHI Irritability and Resentment, AX Anger-in) were grouped together as markers of the broader Neuroticism factor. Thus, Friedman et al. (1995) provided evidence consistent with an ABC conceptualization of trait anger. Results from Friedman et al. should be interpreted cautiously, however, as it was not a study of trait anger per se. Variables were selected for their relation to health outcomes; as such, a small group of trait anger questionnaires was factor analyzed along with several measures unrelated to the hostility or anger domain. 874 Martin et al. Limitations of Prior Studies These prior factor analytic studies suggest the presence of at least three distinct dimensions within the domain of trait anger. Moreover, the three most commonly identified dimensions appear to be broadly consistent with an ABC model. It is noteworthy, however, that with the exception of Musante et al. (1989), no investigators actually have reported a three-factor structure that closely resembles the ABC model. In addition, previous factor analytic research in this domain is limited in several ways. First, only small subsets of the available trait anger questionnaires have been assessed in these studies. Moreover, previous factor analyses have focused exclusively on isolated scales that were developed with the sole intent of assessing trait anger. Relevant measures of anger, hostility, and aggression that are included in broader multidimensional inventories of personality and emotionality have been neglected (e.g., the NEO Personality Inventory–Revised, NEO PI-R; Costa & McCrae, 1992). Second, previous investigators in this area have tended to assume that popular trait anger scales were reliable. Unfortunately, many of these scales are heterogeneous and lack internal consistency. For example, investigators typically report Cronbach’s alpha values of .80 or greater for the Ho Scale (e.g., Cook & Medley, 1954; Smith & Frohm, 1985). However, a decomposition of these values reveals unacceptably low mean interitem correlations of .10 or less, indicating that the scale is too diverse to be represented meaningfully by a single score (see Briggs & Cheek, 1986, and Clark & Watson, 1995). This perspective is consistent with Contrada and Jussim’s (1992) contention that the Ho Scale “may lack the coherent internal structure required for measuring distinctive psychological traits” (p. 615). Steinberg and Jorgensen (1996) similarly noted the multidimensionality of the Ho Scale. A final limitation of previous work in this area is that it has failed to specify exactly how the components of trait anger fall within broader structural frameworks of personality, such as the five-factor model. This issue is critically important because several trait anger questionnaires, such as the Ho Scale (Blumenthal, Williams, Kong, Schanberg, & Thompson, 1978; Carmody, Crossen, & Weins, 1989), BDHI (Sarason, 1961; Siegman, Dembroski, & Ringel, 1987), MAI (Siegel, 1986), and AX (Spielberger et al., 1985), are known to be positively correlated with Neuroticism. This association is of particular interest to health psychologists, because it has been suggested that neurotic hostility is unassociated Trait Anger ABCs 875 with disease, whereas other facets of hostility are considered pathogenic (Costa et al., 1989; Siegman et al., 1987). Consequently, it is important to know which aspects of trait anger are strongly saturated with Neuroticismrelated variance. To date, the best evidence along these lines was reported by Costa et al. (1989), who linked the affective, anger experience dimension of trait anger to Neuroticism, and further proposed that the behavioral component was related to Agreeableness versus Antagonism. Few data, however, on the association between Agreeableness and trait anger are available in the existing literature. Similarly, little evidence is available regarding how the cynical cognition component relates to the higher order traits of personality. Measures such as the Ho Scale, which are thought to tap cynicism (Costa, Zonderman, McCrae, & Williams, 1985; Johnson, Null, Butcher, & Johnson, 1984), are known to be correlated with Neuroticism. Negative attitudes toward others, however, including cynicism and callousness, would seem to be closely linked to low Agreeableness. At a conceptual level, therefore, it seems likely that the cognitive component of trait anger should be related to both Neuroticism and (low) Agreeableness. The Present Research As we have seen, although several studies have found support for a two-factor model of anger experience (i.e., affect and expression), other evidence suggests the possible presence of an additional dimension of cynicism (i.e., cognition). Note, moreover, that earlier studies (a) failed to assess the domain comprehensively and (b) included unreliable, heterogeneous scales. It therefore remains possible that a comprehensive analysis of the domain actually might yield additional dimensions beyond these three. The primary goal of this research was to identify the structure of trait anger, as assessed by self-report inventories. In pursuing this goal, we asked a large sample of undergraduates to complete a comprehensive battery of trait anger questionnaires, as well as two inventories assessing the Big Five traits. In selecting trait anger measures, we included questionnaires commonly used in personality, social, and health psychology. These inventories, including the Ho Scale (Cook & Medley, 1954), BDHI (Buss & Durkee, 1957), Aggression Questionnaire (AQ, Buss & Perry, 1992), ASR (Zelin et al., 1972), MAI (Siegel, 1986), Trait Anger Scale (TAS; Spielberger et al., 1983), and AX (Spielberger et al., 1985), were constructed by the authors as discrete measures of trait 876 Martin et al. anger. In an effort to adequately capture the trait anger domain, we also administered six trait anger scales drawn from broad affect and personality inventories, including the Angry Hostility, Trust, and Compliance facet scales from the NEO PI-R (Costa & McCrae, 1992), the Hostility scale from the Expanded form of the Positive and Negative Affect Schedule (PANAS-X; Watson & Clark, 1994), and the Aggression and Mistrust scales from the Schedule for Nonadaptive and Adaptive Personality (SNAP; Clark, 1993). Together, these measures provided a reasonably comprehensive assessment of the domain. The study proceeded through three major phases. First, we conducted preliminary psychometric analyses on each trait anger scale. The purpose of these analyses was to assure that we were working with variables that were reasonably homogeneous and independent. Second, we subjected the trait anger scales to exploratory factor analyses. Exploratory analyses were necessary at this stage because (a) the previous literature does not clearly establish the structure of trait anger and (b) several of the assessed scales had not been included in any prior structural analyses of this domain. These analyses yielded two interpretable models of trait anger. Finally, confirmatory factor analyses then were conducted to compare the relative fit of these models. The ultimate purpose of the study was to clarify a confusing literature by identifying the constructs assessed in extant trait anger measures. METHOD Participants Undergraduate students (N = 459) received partial course credit for their participation. Data from two participants were omitted from analyses because of failure to follow instructions. The final sample was composed of 457 participants; 242 participants (53%) were women. Participants ranged from 18 to 32 years of age, with a mean of 19.02 years (SD = 1.49). Most participants (n = 408, 89%) were Caucasian; 26 participants (6%) were Asian or Asian American, 16 (4%) were African American, and seven participants (1%) declined to report their ethnic background. Trait Anger Measures Preliminary psychometric analyses. Participants responded to several trait anger questionnaires, which are described in detail below. As previously discussed, Trait Anger ABCs 877 prior investigations in this area often have overlooked issues of internal reliability. Consequently, extensive preliminary psychometric analyses were conducted for each measure. The goal of these preliminary analyses was to identify potentially heterogeneous measures and to rescore them to maximize the interpretability of the constructs assessed. All measures initially were scored in the hostile direction according to their authors’ original instructions (except the ASR; see below). Descriptive and reliability statistics for these measures are reported in Table 1. Optimal reliability was operationalized as a coefficient alpha of .70 or greater, with a mean interitem correlation between .20 and .40. Table 1 illustrates that most scales demonstrated satisfactory internal consistency and these reliable scales were retained in further analyses. Preliminary analyses, however, revealed significant reliability problems with three instruments—the Ho Scale, BDHI, and MAI. In each case, the instrument in question was subjected to exploratory factor analyses, with an evaluation of the full range of possible solutions. The results then were used to develop scoring formats that offered improved reliability and interpretability. Because of scoring difficulties associated with the ASR (see below), this measure also was subjected to exploratory analyses and scale development. Table 2 presents the descriptive and reliability statistics and representative items for the newly developed scales. Additional information regarding the preliminary psychometric analyses is briefly presented below.1 Cook and Medley Hostility (Ho) Scale. The Ho Scale (Cook & Medley, 1954) consists of 50 true/false items, typically represented by a composite score. As shown in Table 1, the coefficient alpha associated with the composite scale was satisfactory; however, the mean interitem correlation was unacceptably low. Issues of internal consistency were not resolved using rationally derived scales developed by Barefoot and associates, also shown in Table 1 (Barefoot, Dodge, Peterson, Dahlstrom, and Williams, 1989). Exploratory factor analyses of the Ho Scale items yielded a two-factor solution, which provided the basis for scoring two new scales (Antagonism and Alienation). As reported in Table 2, the mean interitem correlations for these newly developed scales remained somewhat suboptimal, but the reliability of the both scales represented an improvement over the composite Ho Scale and most of Barefoot et al.’s (1989) rationally derived scales. Furthermore, the Antagonism and Alienation scales did not closely replicate the two-factor Ho Scale solution reported by Costa et al. (1986). Buss-Durkee Hostility Inventory (BDHI). The BDHI (Buss & Durkee, 1957) consists of 75 true/false items, 66 of which assess various aspects of hostility. 1. Items, scoring format, and further analytic information regarding the newly developed scales are available from the first author upon request. 878 Martin et al. Table 1 Study 1: Descriptive and Reliability Statistics for Trait Anger Measures Scale Ho Composite (50) Ho Cynicism (13) Ho Hostile Attribution (12) Ho Hostile Affect (5) Ho Aggressive Responding (9) Ho Social Avoidance (4) BDHI Composite (66) BDHI Assault (10) BDHI Indirect Hostility (9) BDHI Negativity (5) BDHI Irritability (11) BDHI Resentment (8) BDHI Suspicion (10) AQ Physical Aggression (9) AQ Verbal Aggression (5) AQ Anger (7) AQ Hostility (8) MAI Composite (25) MAI Anger-arousal (8) MAI Range of Situations (7) MAI Hostile Outlook (4) MAI Anger-in (5) MAI Anger-out (2) TAS Angry Temperament (4) TAS Angry Reaction (4) AX Anger-in (8) AX Anger-out (8) PANAS-X Hostility (6) SNAP Mistrust (19) SNAP Aggression (20) NEO PI-R Angry Hostility (7) NEO PI-R Trust (6) NEO PI-R Compliance (5) M SD α Mr 21.81 6.83 4.41 2.33 3.76 1.63 30.04 3.50 4.90 2.63 5.59 2.91 3.29 20.11 14.41 16.03 20.14 70.54 17.96 23.42 12.72 13.17 6.32 6.59 9.41 16.90 16.14 12.76 5.92 4.61 12.32 15.91 8.75 7.94 2.81 2.54 1.33 1.95 1.11 10.58 2.70 2.09 1.30 2.45 2.02 2.35 7.57 4.04 5.44 6.02 14.20 6.19 4.77 3.22 3.63 1.85 2.76 2.69 4.39 4.02 4.76 4.32 4.12 4.57 3.31 3.23 .85 .70 .66 .47 .57 .32 .89 .81 .63 .47 .66 .65 .68 .86 .76 .83 .79 .89 .87 .77 .67 .66 .67 .89 .78 .78 .78 .81 .84 .85 .77 .81 .59 .10 .16 .14 .15 .12 .11 .10 .29 .16 .15 .15 .18 .18 .41 .39 .42 .32 .45 .33 .33 .26 .51 .24 .68 .47 .31 .31 .41 .22 .24 .32 .42 .21 Note. The number of items appears in parentheses after each scale. M r = mean interitem correlation. Trait Anger ABCs 879 Table 2 Newly Developed Scales: Descriptive and Reliability Statistics and Sample Items Scale M Ho Scale Antagonism (17) 8.51 “I am often inclined to go out of my way to win a point with someone who has opposed me.” Ho Scale Alienation (16) 6.65 “I am not likely to speak to people until they speak to me.” BDHI Physical Aggression (15) 6.61 “If somebody hits me first, I let him have it.” BDHI Cynicism-Mistrust (19) 6.54 “I know people tend to talk about me behind my back.” BDHI Angry Reactivity (13) 7.66 “When I am angry, I sometimes sulk.” ASR Anger Expression (17) –8.12 “I have physically hurt someone in a fight.” ASR Neuroticism (16) –13.84 “I never do anything right.” ASR Anger Valuation (12) 10.60 “People should never get irritated.” ASR Cynicism-Mistrust (8) –3.71 “Often people are friendly when they want something. . .” MAI 56.59 “I am surprised at how often I feel angry.” SD α Mr 3.59 .75 .15 3.41 .74 .15 3.71 .81 .22 4.13 .80 .18 2.68 .65 .13 17.84 .85 .26 13.96 .81 .21 8.98 .68 .14 8.58 .77 .30 13.72 .90 .30 Note. The number of items appears in parentheses after each scale. M r = mean interitem correlation. (The nine remaining items measure guilt.) The BHDI often is scored as a composite index. Furthermore, the hostility items sometimes are grouped into six rationally constructed scales (e.g., Resentment, Irritability). As reported in Table 1, the BDHI composite and most of its traditional subscales were not optimally reliable. In an attempt to improve internal consistency, exploratory factor analyses were conducted on the 66 BDHI hostility items. A three-factor 880 Martin et al. solution was adopted, and three new scales, Physical Aggression, CynicismMistrust, and Angry Reactivity, were developed (see Table 2). Aggression Questionnaire (AQ). The AQ (Buss & Perry, 1992) includes 29 items, rated from 1 (extremely uncharacteristic of me) to 5 (extremely characteristic of me). Four scales were scored: Physical Aggression (nine items), Verbal Aggression (five items), Anger (seven items), and Hostility (eight items). The item content of the Physical and Verbal Aggression scales is reasonably clear from the scale titles. The names of the “Anger” and “Hostility” scales may be confusing, however, because these two terms are often used interchangeably. Anger scale items primarily describe the experience of angry emotion (e.g., “I sometimes feel like a powder keg ready to explode”). In contrast, Hostility scale items relate to cynical, mistrustful interpersonal attitudes (e.g., “I am suspicious of overly friendly strangers”). Anger Self-Report (ASR). The ASR (Zelin et al., 1972) consists of 64 items, rated on a 6-point scale ranging from –3 (strong disagreement) to +3 (strong agreement). Unfortunately, scoring instructions provided by the ASR’s authors presented several ambiguities that made it difficult to score or evaluate the instrument with any confidence. In addition, the internal structure of the ASR had never been examined using factor analysis. The ASR therefore was subjected to exploratory factor analyses, which led to the development of four scales—Anger Expression, Cynicism, Neuroticism, and Anger Valuation. Note that Neuroticism scale items were scored in the neurotic direction and high scores on the Anger Valuation scale reflected more positive evaluations of anger. Multidimensional Anger Inventory (MAI). The MAI (Siegel, 1986) includes 38 items that are rated on a scale ranging from 1 (completely undescriptive) to 5 (completely descriptive). Siegel (1986) summed 25 of these items to create a total MAI score, and also developed five subscales using factor analysis. As shown in Table 1, initial psychometric analyses indicated that the alpha reliabilities for three of these subscales were below .70. In addition, the mean interitem correlations for two scales were above .40, suggesting some redundancy in item content. Finally, several of the subscale correlations were large (e.g., Anger-in correlated .66 with Anger-Arousal, and Hostile Outlook correlated .67 with Range of Situations). Preliminary exploratory factor analyses led us to construct a single internally reliable scale consisting of 22 items (see Table 2). Trait Anger Scale (TAS). The TAS (Spielberger et al., 1983) is comprised of 10 items, which are rated from 1 (almost never) to 4 (almost always). Two scales were scored: Angry Temperament (4 items) and Angry Reaction (4 items). The Angry Temperament scale is characterized by items such as “I have a fiery temper,” whereas Angry Reaction items have an interpersonal component (e.g., “I get angry when slowed down by others’ mistakes”). Trait Anger ABCs 881 Anger Expression (AX) Scale. The AX Scale (Spielberger et al., 1985) includes 20 items, rated from 1 (almost never) to 4 (almost always). Two scales were scored: Anger-in (eight items) and Anger-out (eight items). The AX Anger-in scale includes items related both to the non-expression of anger (e.g., “I boil inside, but don’t show it”) as well as to generalized distress (e.g., “I withdraw from people”; “I pout or sulk”). Previous research (Martin et al., 1999; Martin & Watson, 1997) has indicated that AX Anger-in is related diffusely to negative affect and Neuroticism, and is not a specific index of anger per se. In contrast, most AX Anger-out scale items are directly related to overt acts of aggression. NEO PI-R Angry Hostility, Trust, and Compliance Facet Scales. Th e Angry Hostility, Trust, and Compliance facet scales were extracted from the NEO PI-R (Costa & McCrae, 1992). Each scale is composed of eight items; items are rated on a 5-point scale, ranging from strongly agree to strongly disagree. The Angry Hostility scale is a facet of the Neuroticism domain and was constructed to measure anger experience. The Trust scale assesses attitudes toward others, contrasting perceived trustworthiness with dishonesty. The Compliance scale measures aggressive behavioral responses to conflict. The Trust and Compliance scales are facets of the Agreeableness domain, so that hostile responses receive lower scores on both scales. It should be noted that one item from the Angry Hostility scale, two Trust items, and three Compliance items also appear in another of the personality inventories completed by participants, the NEO Five Factor Inventory (NEO-FFI; Costa & McCrae, 1992). Because retention of the duplicated items would spuriously increase correlations between trait anger and the Neuroticism and Agreeableness domains of the NEO-FFI, these duplicated items were deleted from the facet scales prior to scoring. PANAS-X Hostility Scale. The Hostility scale of the PANAS-X (Watson & Clark, 1994) consists of six terms assessing anger-related affect, such as “angry” and “irritable.” Participants were instructed to rate how well each term described their usual feelings on a 1 (very slightly or not at all) to 5 (extremely) scale. SNAP Aggression and Mistrust Scales. Two scales, Aggression (20 items) and Mistrust (19 items), were extracted from the SNAP (Clark, 1993). SNAP Aggression scale items pertain to aggressive acts and angry emotions, whereas the SNAP Mistrust scale measures negative interpersonal attitudes. Both scales are composed of true/false items. Big Five Measures In addition to the trait anger scales, participants completed two measures of the five-factor model of personality: the Big Five Inventory (BFI; John, Donahue, & Kentle, 1991) and the NEO-FFI (Costa & McCrae, 1992). Two Big Five 882 Martin et al. indices were used to provide a comprehensive assessment of the personality dimensions. The 44 BFI items are rated from 1 (very uncharacteristic of me) to 7 (very characteristic of me). The BFI Openness scale includes 10 items, the Agreeableness and Conscientiousness scales each include nine items, and the Neuroticism and Extraversion scales are comprised of eight items each. The NEO-FFI is derived from the longer NEO PI-R. It includes 60 items (12 for each scale) that are rated from 1 (strongly agree) to 5 (strongly disagree). Previous research has demonstrated that corresponding scales from the BFI and NEO PI-R are strongly convergent with each other (Watson, Clark, & Harkness, 1994). All BFI and NEO-FFI scales demonstrated good internal reliability. Procedure Participants reported to the laboratory in groups of 10 to 20. After informed consent was obtained, participants completed the individual difference questionnaires. The order of instruments was arranged so that trait anger inventories were separated by other types of individual difference questionnaires as much as possible. Given this restriction, the order of questionnaires was counterbalanced across participants. Most participants required approximately 90 min to complete the questionnaires; all participants took a brief break halfway through the session. Participants received partial course credit and nominal monetary compensation for their efforts. RESULTS Exploratory Factor Analyses Principal axis factor analyses were conducted on the 24 trait anger scales. We inspected the eigenvalues for the first several unrotated factors; the eigenvalues were 10.86, 3.09, 1.43, 1.03, 0.83, and 0.70 for the first through sixth factors. The full range of solutions, up to and including five factors, was evaluated. Both oblique and orthogonal rotations were examined, and the two approaches generated convergent, virtually identical solutions. We begin by presenting the results using a Varimax rotation for the two- through five-factor solutions. Oblique rotations are discussed subsequently. A marker was defined as any scale that loaded |.30| or greater on a factor and had its highest loading on that factor; the number of markers (out of 24 scales) for each factor in each solution is presented in Table 3. The most noteworthy aspect of these data is that all factors beyond the third were small and poorly defined, suggesting that a maximum of three factors be retained. Trait Anger ABCs 883 Table 3 Number of Markers for One- Through Five-Factor Trait Anger Solutions Number of markers for factor number Number of factors in solution 1 2 3 4 5 1 2 3 4 5 24 13 11 11 9 11 8 7 7 5 5 6 1 1 1 All 24 trait anger scales had loadings of greater than |.30| on the single-factor solution, indicating the presence of a large general factor. Because our primary goal was to explore conceptual distinctions among various types of trait anger, however, more complex solutions were considered. Both the two- and three-factor solutions were interpretable and are discussed further. The four- and five-factor solutions are not presented in detail, as they each yielded dimensions that were defined by a single marker. The first factor of the two-factor solution was composed primarily of scales related to cynicism and mistrust (e.g., BDHI Cynicism-Mistrust, SNAP Mistrust). This factor, however, included two scales (PANAS-X Hostility and BDHI Angry Reactions) that focused primarily on the experience of angry feelings rather than cynicism per se. We named this first factor “Cynicism/Anger.” Scales related to anger expression and behavioral aggression (e.g., ASR Anger Expression, BDHI Physical Aggression) made up the second factor of the two-factor solution. This factor also included three scales (AQ Anger, TAS Angry Temperament, and NEO PI-R Angry Hostility) relevant to anger experience. Thus, the second factor was labeled “Aggression/Anger.” The two-factor solution is presented in Table 4. When three factors were extracted, the scales related to angry affect and experience formed their own cluster, distinct from the cynicism and behavioral aggression scales. As such, the three-factor solution closely resembled the proposed ABC structure of trait anger. The cognitive dimension of the ABC model was represented by the first factor (“Cynical Cognition”), which was composed of cynicism-mistrust scales. The 884 Martin et al. Table 4 Two-Factor Solution for Trait Anger Scales Trait Anger Factor Scale Cynicism/Anger Aggression/Anger BDHI Cynicism-Mistrust SNAP Mistrust Ho Scale Alienation AQ Hostility MAI ASR Cynicism-Mistrust AX Anger-in ASR Neuroticism PANAS-X Hostility NEO PI-R Trust Ho Scale Antagonism TAS Angry Reactivity BDHI Angry Reactivity .86 .82 .81 .77 .72 .69 .69 .63 .55 –.53 .48 .48 .41 .18 .12 .08 .25 .49 .22 .03 .18 .45 –.19 .45 .36 .37 ASR Anger Expression BDHI Physical Aggression AQ Physical Aggression AX Anger-out NEO PI-R Compliance SNAP Aggression AQ Anger TAS Angry Temperament AQ Verbal Aggression NEO PI-R Angry Hostility ASR Anger Valuation .14 .10 .18 .23 –.17 .32 .40 .35 .20 .54 .03 .86 .82 .75 .75 –.75 .74 .68 .64 .63 .58 .40 second factor (“Behavioral Aggression”), marked by anger expression and aggression scales, represented the model’s behavioral component. Finally, the affective domain of the ABC model was represented by the third factor (“Angry Affect”), which included scales pertaining to the experience of angry emotion. The three-factor solution is presented in Table 5.2 2. Note that in both the two- and three-factor solutions, we opted to apply the label “cynicism” to the dimensions representing anger-related cognitions. This label may not Trait Anger ABCs 885 Choosing between the two- and three-factor solutions. Four main issues, detailed below, were considered in evaluating the relative merit of the two- versus three-factor solutions. First, we compared our two- and three-factor solutions to the extant literature. Second, we evaluated the average intermarker correlations both between and within factors of both solutions. Third, the associations between each model and the Big Five traits were explored. Finally, confirmatory factor analyses were conducted to evaluate the relative fit of the two- versus three-factor solutions.3 Comparing the two- and three-factor models to the trait anger literature. Our two-factor solution was decidedly different from the two-factor representations of trait anger reported by previous researchers. As reviewed earlier, a number of previous factor analyses (Bendig, 1962; Bushman et al., 1991; Buss & Durkee, 1957; Costa et al., 1989; Musante et al., 1989), based on questionnaires such as the BDHI, ASR, MAI, TAS, and Novaco Anger Inventory (Novaco, 1975), resulted in two interpretable factors, representing anger expression and anger experience. Our two-factor solution, however, clearly departs from earlier findings in that one of the factors is dominated by scales assessing cynicism, rather than anger experience. The present study apparently represents the first factor analysis of trait anger measures to yield a two-factor solution reflecting the basic dimensions of cynicism and behavioral aggression. The unusual character of the two-factor solution suggested that our three-factor solution actually might be more compatible with the literature. fully characterize the subtleties of anger-related cognitions. It does, however, capture the fundamental theme of interpersonal distrust and disparagement that characterizes the relevant scales (e.g., BDHI Cynicism-Mistrust, SNAP Mistrust). In addition, the cynicism label also is consistent with common usage among personality, social, and health psychologists (e.g., Costa et al., 1986). 3. The issue of model replicability also was considered in evaluating the three-factor model. The data were separated on the basis of subject sex. Exploratory factor analyses of the male and female data sets yielded virtually identical three-factor solutions. The convergence between the male and female three-factor solutions then was examined quantitatively using regression-based scoring weights (Gorsuch, 1983; Harman, 1976). The results indicated that the three-factor model of trait anger was replicable and that the structure of trait anger was highly robust across gender. 886 Martin et al. Table 5 Three-Factor Solution for Trait Anger Scales Trait Anger Factor Cynical Cognition Behavioral Aggression Angry Affect BDHI Cynicism-Mistrust SNAP Mistrust Ho Scale Alienation ASR Cynicism-Mistrust AQ Hostility AX Anger-in MAI NEO PI-R Trust ASR Neuroticism Ho Scale Antagonism TAS Angry Reactivity .84 .83 .81 .75 .71 .62 .59 –.57 .56 .50 .41 .16 .12 .07 .25 .18 –.04 .32 –.23 .09 .47 .27 .24 .16 .16 .05 .31 .27 .58 –.04 .34 .14 .33 ASR Anger Expression BDHI Physical Aggression AQ Physical Aggression NEO PI-R Compliance SNAP Aggression AX Anger-out AQ Verbal Aggression ASR Anger Valuation .16 .14 .21 –.15 .26 .15 .17 .00 .90 .89 .78 –.70 .65 .63 .59 .36 .16 .09 .13 –.27 .40 .44 .25 .16 NEO PI-R Angry Hostility TAS Angry Temperament AQ Anger BDHI Angry Reactivity PANAS X Hostility .37 .17 .24 .27 .45 .35 .42 .47 .17 .32 .72 .69 .68 .57 .47 Scale Average intermarker correlations. All factor analytic techniques attempt to summarize the pattern of covariation among measures using a much smaller number of latent dimensions (Floyd & Widaman, 1995; Watson, Clark, & Harkness, 1994). Consequently, another approach to evaluating the relative merit of the two- versus three-factor solutions is to examine the average intermarker correlations both within and between factors. Following the general logic of factor analysis, a clear, well-defined Trait Anger ABCs 887 solution (i.e., one that summarizes the pattern of covariation particularly well) should maximize the correlations among the markers defining the same factor, while at the same time minimizing the correlations among variables defining different factors. We therefore computed the average intermarker correlations for both the two- and three-factor solutions (in these analyses, the correlations were subjected to an r to z transformation before averaging). For the two-factor solution, the mean intermarker correlation within factors was .51. The mean correlation between markers of the cynicism/anger experience and aggression/anger experience factors was notably lower (.34), demonstrating that at least two well-defined variable clusters could be identified in these data. The three-factor solution offered a modest improvement in the mean within-factor correlations, along with a corresponding small increase in the between-factor values. Specifically, the mean correlation among variables defining the same factor was .54 for the three-factor solution. In contrast, the cross-factor correlations were substantially lower, with a mean intermarker correlation between factors of .38. Although a comparison of the average intermarker correlations did not clearly indicate that one solution was superior to the other, the analyses of the three-factor solution demonstrated that three well-defined variable clusters could be identified in these data. In other words, the average intermarker correlations revealed that the three-factor solution captured meaningful conceptual distinctions within this array of trait anger scales. Associations with the Big Five traits. To compare and contrast the twoand three-factor solutions further, scores on each factor were correlated with the Big Five dimensions of personality. As described in the Method section, participants completed two Big Five inventories, the NEO-FFI (Costa & McCrae, 1992) and the BFI (John et al., 1991). Five general trait scores (Neuroticism, Extraversion, Openness to Experience, Agreeableness, and Conscientiousness) were scored from each of these instruments. A principal axis factor analysis then was conducted on the 10 scale scores. Five factors, clearly representing the five general domains of personality, were extracted and rotated using Varimax. Next, regressionbased factor scores were computed to measure each of the five broad dimensions. These scores, in turn, were correlated with regression-based scores assessing the trait anger factors that had emerged in both the twoand three-factor solutions. Table 6 presents the correlations between the 888 Martin et al. Big Five factor scores and factor scores from both the two- and threefactor solutions. In both the two- and three-factor solutions, aggression was strongly associated (r = –.61 and r = –.58, respectively) with low levels of Agreeableness. In the two-factor solution, cynicism was strongly correlated with Neuroticism (r = .53) and more moderately related to Agreeableness (r = –.41). The relations between cynicism, Neuroticism, and Agreeableness shifted substantially, however, when a third factor was extracted. Specifically, in the three-factor solution, the correlations between cynicism and Neuroticism (r = .37) and cynicism and Agreeableness (r = –.41) were nearly equal. In this solution, it was the anger experience factor that was strongly correlated with Neuroticism (r = .58), and more modestly related to Agreeableness (r = –.27). The pattern of associations between cynicism, anger experience, Neuroticism, and Agreeableness should be of considerable interest to health psychologists. Individuals with high Neuroticism scores are known to offer frequent somatic complaints, but do not appear to suffer greater morbidity or mortality than individuals who are low in Neuroticism (Costa & McCrae, 1987; Watson & Pennebaker, 1989). Consequently, it is important for researchers attempting to examine the contribution of hostility to cardiovascular and other physical disorders to be able to separate measures tapping Neurotic aspects of trait anger from those related to low Agreeableness. This line of reasoning suggests that the two-factor solution obscured potentially important information by combining content related to Cynicism and Anger Experience, because only the latter is strongly saturated with Neuroticism-related variance. Relative fit of the two- versus three-factor models. As a final step in evaluating the merits of the three-factor model, confirmatory factor analyses were conducted. The results of the exploratory factor analyses previously described were used to generate the two- and three-factor models to be tested. More complex models were not tested because the exploratory factor analyses yielded four- and five-factor solutions that included extremely small, uninterpretable factors. Before proceeding, the data were examined for multivariate normality in order to establish the appropriateness of using a maximum likelihood solution in the confirmatory factor analyses. The skewness ranged from –0.32 to 1.40 and the kurtosis ranged from –1.01 to 1.42. The data did not depart from Trait Anger ABCs 889 Table 6 Zero-Order Correlations Between Two- and Three-Factor Trait Anger Solutions and Big Five Factor Scores Two-Factor Solution Cynicism/Anger Aggression/Anger Three-Factor Solution Cynical Cognition Behavioral Aggression Angry Affect N E O A C .53 .07 –.23 .17 –.14 .03 –.41 –.61 –.14 –.12 .37 –.14 .58 –.24 .15 .04 –.11 .06 –.08 –.41 –.58 –.27 –.13 –.11 –.07 Note. Correlations > .09 are statistically significant at the .05 level. N = Neuroticism; E = Extraversion; O = Openness; A = Agreeableness; C = Conscientiousness. N = 457. multivariate normality and a maximum likelihood estimation was deemed appropriate. The adequacy of fit of each model was evaluated and then the relative fit of the two- and three-factor models was compared. All analyses were conducted with LISREL 8. A two-factor model was formulated using the results obtained from the two-factor solution. A three-factor model was constructed in a similar fashion. Scales were allowed to load on multiple factors. The fit indices were stronger for the three-factor model, χ2(239) = 1056.95, p < .0001, CFI = .90, GFI = .83, than for the two-factor model, χ2(242) = 1518.83, p < .0001, CFI = .84, GFI = .72. Nested χ2 tests were conducted to assess the relative fit of the twoversus the three-factor model. When the two-factor model was compared to the three-factor model, the difference was statistically significant, χ2(3) = 461.88, indicating that the three-factor model’s representation of the observed correlation matrices was superior to that associated with the two-factor model. The anger experience factor correlated .47 and .53 respectively with the aggression and cynicism factors. The correlation between the aggression and cynicism factors was .43. Additional Issues Three-factor solution with oblique rotation. To this point, all analyses were based on orthogonal Varimax rotations. Anger experience, aggression, 890 Martin et al. and cynicism, however, all reflect a common underlying dimension of anger and hostility; thus, one would expect these different manifestations of hostility to be intercorrelated. As such, it is possible that an oblique rotation might offer greater clarity in representing the structure of trait anger. To explore this possibility, the three-factor principal axis factor analysis was conducted once again on the 24 trait anger scales. An Oblimin rotation was used, with a delta value of zero. Markers were defined as before. The three-factor oblique solution was highly similar to its orthogonal counterparts, which is consistent with previous findings that factor structures are highly robust across different types of rotation, given a large sample and well-defined factors (Goldberg, 1990; Guadagnoli & Velicer, 1988; Snook & Gorsuch, 1989; Watson, 1988). Cynicism, aggression, and anger experience factors again were obtained. Twentythree of 24 scales marked the same factor in the oblique and orthogonal three-factor solutions. The MAI was the only exception. In the threefactor orthogonal rotation, the MAI marked the cynicism factor, but in the oblique rotation, it marked the anger experience factor. In the threefactor oblique solution, the correlation between the cynicism and aggression factor was .38, whereas the correlation between cynicism and anger experience was .53. The correlation between the aggression and anger experience factors was .52. Mean-level gender differences. As previously described in footnote 3, the structure of trait anger did not differ between men and women. To further explore issues of gender and trait anger, t-tests were used to compare mean factor score differences (computed using the Varimaxrotated factors) between men and women for the three-factor solution. Men (M = .45, SD = .85) were found to have significantly higher Behavioral Aggression factor scores than women (M = –.40, SD = .88), t(455) = 10.47, p < .001. This pattern was reversed for Angry Affect factor scores. Women’s Angry Affect factor scores (M = .17, SD = .85) were significantly higher than men’s (M = –.19, SD = .95), t(455) = –4.25, p < .001. Men’s Cynical Cognition factor scores (M = .01, SD = .97) were somewhat higher than women’s (M = –.01, SD = .95); however, this difference was not significant, t(455) < 1. Trait Anger ABCs 891 DISCUSSION Our analyses indicated that the three-factor solution provided the optimal representation of the data. This solution was conceptually clearer than the two-factor solution, in which anger experience overlapped with both cynicism and aggression. The three-factor solution additionally clarified associations among anger experience, cynicism, Neuroticism, and Agreeableness that were obscured in the two-factor solution. Consistent with prior research, the Angry Affect factor was most strongly related to Neuroticism, whereas Behavioral Aggression was strongly related to low Agreeableness. The Cynical Cognition factor emerged as a Neuroticism/low Agreeableness hybrid. Furthermore, confirmatory factor analyses indicated that the three-factor model fit the data significantly better than the two-factor model. Thus, it was decided to retain the three-factor solution. Consistent with the broad dimensions of affect, behavior, and cognition, we named the first factor “Cynical Cognition,” the second factor “Behavioral Aggression,” and the third factor “Angry Affect.” Our results differ from several prior studies which produced two-factor solutions composed of affect and behavior (e.g., Bendig, 1962; Bushman et al., 1991; Buss & Durkee, 1957; Costa et al., 1989; Musante et al., 1989). Our results are compatible, however, with a handful of studies that suggested that cynicism is an additional factor that should not be overlooked in the conceptualization of trait anger (Costa et al., 1986, Friedman et al., 1995; and Musante et al., 1989). The three-factor solution obtained in the present research was a consequence of carefully selecting a comprehensive array of individual difference measures that attempted to fully capture the affective, behavioral, and cognitive elements of trait anger. Although it ultimately was decided that the three-factor solution provided the best representation of the data, the two-factor solution was carefully evaluated as well. Importantly, the two-factor solution differed substantially from the anger experience–anger expression model popular in the behavioral medicine literature (e.g., Costa et al., 1989; Smith, 1992; Suls et al., 1995). The two-factor solution was dominated by the dimensions of cynicism and aggression, whereas measures of anger experience were distributed equally across the two factors. It is likely that cynicism emerged in the present two-factor solution because several of the assessed trait anger scales were carefully chosen to measure the cynicism dimension. 892 Martin et al. Costa et al. (1989) related anger expression to Agreeableness and anger experience to Neuroticism. The literature, however, offered little information regarding the relation of Cynical Cognition to these traits. Furthermore, it was unclear whether components of trait anger were systematically related to the other Big Five domains of Extraversion, Openness to Experience, and Conscientiousness. Consistent with prior research, the results indicated that trait anger is most closely related to Neuroticism and Agreeableness. Behavioral Aggression was related strongly to low Agreeableness, and weakly to the other four general personality traits. In contrast, Angry Affect was strongly correlated with Neuroticism. Interestingly, Cynical Cognition was equally associated with Neuroticism and low Agreeableness in both studies. Thus, the relation between Behavioral Aggression and low Agreeableness was relatively straightforward. Similarly, Angry Affect was dominated by its correlation with Neuroticism. The associations between Cynical Cognition and the Big Five traits were more complex, however: Cynical Cognition appeared to represent a blend of neurotic and disagreeable characteristics. In interpreting our results, it is interesting to note that the Ho Scale has been linked to cardiovascular disease (Barefoot et al., 1983; Barefoot et al., 1989; Shekelle et al., 1983; Williams et al., 1980). In the present study, the Ho Alienation and Antagonism scales both marked the Cynical Cognition factor. Consequently, future research should carefully evaluate the association between the cynical cognitive component of trait anger and health. Of particular interest is the issue of whether it is the neurotic or disagreeable aspect of Cynical Cognition that is crucial in the development of cardiovascular disease. In this regard, it is well established that Neuroticism is a poor predictor of objective health outcomes (Costa & McCrae, 1987; Watson & Pennebaker, 1989). This might be taken to indicate that it is the disagreeable component of cynicism that is critically important for health, and that the neurotic element is relatively uninteresting. If this interpretation were true, however, then one would expect that Behavioral Aggression—which is even more strongly associated with low Agreeableness—would be an even better predictor of health. The empirical literature is mixed regarding this point, however (Miller et al., 1996; Smith, 1992). Another possibility is that it is the combination of high Neuroticism and low Agreeableness that predicts health-relevant outcomes. If so, then behavioral medicine researchers may have been premature both in classifying the Ho Scale as a measure of neurotic Trait Anger ABCs 893 hostility (Suls et al., 1995) and in discounting the importance of neurotic hostility for health outcomes (e.g., Costa et al., 1989; Suls et al., 1995). Careful investigation into the relations among Cynical Cognition, Agreeableness, Neuroticism and health may help explicate the mysterious ability of the Ho Scale to predict disease. The application of an ABC model to the trait anger domain is likely to be most useful in its ability to improve precision in the assessment of trait anger. The related, but separable, factors of Angry Affect, Behavioral Aggression, and Cynical Cognition reflect the fact that all forms of anger do not share similar manifestations and consequences. The person prone to the experience of angry emotions, for example, is not necessarily at increased risk of committing assaultive acts. Thus, the three dimensions of trait anger may be differentially predictive of different kinds of consequences or outcomes and, in problematic cases, differentially responsive to prevention and clinical intervention. Physiologic processes often are implicated in discussions of potential mechanisms that link trait anger to health and behavioral outcomes. The semi-independence of affect, behavior, and cognition in the anger domain suggests that multiple physiologic mechanisms may mediate the effects of trait anger. It is notable that, regardless of rotational strategy, the exploratory factor analyses yielded solutions in which several scales loaded on more than one factor. Furthermore, although confirmatory factor analyses established the superior fit of the three-factor model, the fit indices were adequate, but not remarkably strong. 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