Finding pattern of physics problem solving strategies from metacognitive perspective Marlina Ali, Corrienna Abdul Talib, Hafizah Harun, Nor Hasniza Ibrahim, Abdul Halim Abdullah & Johari Surif Department of Educational Science, Mathematics and Creative Multimedia, Faculty of Education, Universiti Teknologi Malaysia Skudai, Malaysia [email protected], [email protected], [email protected], [email protected], [email protected], [email protected] Abstract—The purpose of this paper is to discuss how this study identifies the pattern of physics problem solving strategies from metacognitive skills between “more successful” and “less successful” problem solvers. This study consisted of 21 local students and no international students involved. All students undergone similar education system. Respondents solved four physics problems while talking aloud. However, for the purpose of this paper, only results from lift problem were discussed. Each of the respondents were videotaped. Interviews were conducted right after the test. Written answers from the physics task were marked according to the schema. The thinking aloud were transcribed verbatim from the videotapes as well as interviews. Transcripts were coded and examined looking for both similarities and differences. As a conclusion, there were differences between “more successful” and “less successful” problem solvers in solving physics problems. The pattern of physics problem solving in this paper presents two comparisons; one pattern was identified by comparison between two students; one from the “more successful” group and one from the “less successful” group. Two students, one called Emma who was a more successful (MS) problem solver and Sophia who was a less successful (LS) problem solver, were selected as a benchmark based on overall perception that they differed in their level of metacognition. The second pattern was identified by comparison between the two groups of more and less successful problem solvers where both groups consisted of five students. However, for the purpose of this paper, only patterns from lift problem were discussed. Keywords—more successful vs less successful; problem solving; pattern; metacognition; thinking aloud I. INTRODUCTION Numerous physics problem solving models have been proposed [1-3]. The steps that were proposed by Adamovic and Hedden [1] are only successful when students are dealing with easy and straightforward questions. In fact, Adamovic and Hedden [1] admitted this, where the proposed model was successful only when students were dealing with traditional physics problems. In all these models, it is expected that students’ actions can be oriented to the direction of finding the right or best solution to a problem. Examples of steps that are taught to find the right solution are given in Table I. Metacognitive skills can help solve physics problem solving successfully [4, 5]. For example: Larkin [6] discovered that physics experts differ from novices where the experts perform an initial qualitative analysis of the problems before using Sponsors: Ministry of Higher Education (MOHE), Malaysia and Universiti Teknologi Malaysia (UTM) appropriate equations for the quantitative solution to the problems. Malone [5] demonstrated that students who received Modelling Instruction pedagogy are actively monitoring and regulating their cognitive processes while solving problems. In addition, they routinely made more metacognitive statements compared to students that learnt using conventional instruction especially in evaluating/checking as follows: approach taken; information used; appropriateness of the equations; and answer as well. Chi et al., [7] analyzed self-explanation of good and poor problem solvers in physics as they studied and worked out examples. This study shows that actively and accurately monitoring their comprehension of the examples helps good problem solvers produced more self-explanations compared to poor problem solvers. Ferguson-Hessler and de Jong [8] also discovered when studying a physics text, monitoring of their comprehension helps good problem solvers produce more selfexplanations and become better at detecting comprehension failures. TABLE I. Activities/ Author(s) Reif, Larkin & Brackett [9] Heller, Keith & Anderson [10] Adamovic & Hedden [1] PHYSICS PROBLEM SOLVING STRATEGY 1 2 3 4 5 - Description Planning Impleme ntation Checking Focus the problem Describe the physics Plan the solution Execute the plan Evaluate the answer Read the problem Write down what you know, Write down what you don’t know-what is the problem asking for? - Find the correct equations to use, and write it down, Rewrite the equations with correct numbers in it and solve it Write the answer down with the correct units A. Research Objectives The purpose of this study is to identify the pattern of physics problem solving between more successful and less successful problem solvers in solving physics problem. B. Research Questions What are the patterns of physics problem solving between more successful and less successful problem solvers in solving physics problem? II. BACKGROUND OF THE PROBLEM The following sections discuss relevant issues why this study is important. The literatures for the following problems have been extracted from many areas particularly in physics and mathematics because it seems these areas possess many similarities. There are four problems that have been identified as follows: A) Absence or lack of metacognitive skills in Physics and Mathematics There have been several studies that show that metacognition is either lacking or absent in situations where: students do not solve the problem successfully -that there is an absence of consistent monitoring and regulating of the problem solving processes [11]; without metacognitive monitoring, students are less likely to take one of the many paths available to them and are almost certainly less likely to arrive at an elegant mathematical solution [12]; the absence or lack of metacognition causes students to fail to solve the problem succesfully [13-15]. In contrast, a study by Sternberg [16] showed how the presence of metacognition in problem solving lead experts to resolve geometry problems successfully. Experts manage to solve problems even though novices knew more about geometry. The reason experts arrived at successful solutions was because they utilised self-monitoring and self-regulation consistently when dealing with the problem [16]. From research, metacognition has been demonstrated as a factor that can enhance problem solving performance [4, 13, 17]. The importance of metacognition in problem solving has been claimed by Heller [18] to help students: manage time and direction, determine next steps, monitor understanding, ask skeptical questions, and reflect on their own learning processes. In addition, Davidson, Deuser, and Sternberg [19] also claim that metacognition helps the problem solver to see that there is a problem to be solved, work out what exactly the problem is, and understand how to reach the solution. Moreover, Fernandez, Hadaway, and Wilson [20], claim that metacognitive skills like planning, monitoring and evaluating are important to manage problem solving strategies. A number of these studies were in mathematics [11] not physics. While one would expect that many of the aspects of metacognition that are useful in math would also be useful in physics, one would also expect some differences. Therefore, the researcher intends to study the roles of metacognition in problem solving processes in physics. B) Traditional problems do not reinforce problem solving Learning by solving problems is an essential component in the development of skills in physics. However, according to Phang [4], traditional problems or textbook problems are genuine problems only for novices but easy for experts. Foong [14] reported, there was little or no evidence of metacognition if the students dealt with easy and routine problems. The more complex the problem, the more likely it seems that reflection will be used in problem solving by successful problem solvers [14]. According to Heller [18], traditional problems can often be solved by manipulating equations, they need little visualization, few decisions are necessary, they are disconnected from students’ reality and can often be solved without knowing physics. There is a considerable amount of research, particularly in physics problem solving, employing traditional or textbook problems e.g., Gaigher, Rogan, and Braun [21]; Charles and Hedden [22]; Larkin [23]. The use of context rich problems positively influences students’ attitude towards problem solving. As demonstrated by Heller, Keith, and Anderson [10] the use of context rich problems can: • change students’ behavior and reduce their problem solving strategies of searching for equations that have the same variables as the knowns and unknowns; • increase students’ descriptions of more expansive strategies within their reflections. In particular, there is a large increase in describing the use of diagrams, and thinking about concepts first. The advantage of using context rich problems was also demonstrated by Ogilvie [24] who showed that context rich problems required students to engage in analysis and planning stages. Therefore, in this proposed study, the researcher intends to use context rich problems as tasks in problem solving. C) Fewer studies about problem solving from metacognitive perspective have been done at university level According to Veenman and Spaans [25], metacognitive skills emerge at the age of 8 to 10 years and expand during the years thereafter. Also, certain metacognitive skills, such as monitoring and evaluation, appear to mature later. A considerable number of studies have been carried out on problem solving and metacognition among students at primary and secondary level, for example, Yeap [26] - grade 7 mathematics; Siemon [27] - children/mathematics; Mohamed and Nai [28] - form 4 mathematics; Stillman and Galbraith [29] - senior secondary students for mathematics, Wilson and Clarke [30] - grade six mathematics, Galbraith, Goos, and Renshaw [31] - senior secondary school mathematics; Goos and Galbraith [32] - high school mathematics, Phang [4] - 1416 year olds and physics; Finegold and Mass [33] - grade twelve physics; and Malone [5] - first and second year physics. However little research has been done on students at university level. Chi et al. [7] studied physics university students. Biryukov [15] investigated second year university students doing mathematics and not physics, and Foong [14] studied pre service teachers at university level, but again mathematics not physics. For this reason, this study intends to investigate physics problem solving and metacognition among students at university level. D) Fewer studies to differentiate physics problem solving between successful problem solvers and less successful problem solvers from a metacognitive perspective Most physics problem solving studies reported in section focus on the differences between experts and novices in behavior and knowledge organisation. Consequently, these studies select expert participants among professors in Physics and novices among undergraduate physics students [34-43]. There are also some studies focusing on the comparison between “more successful” and “less successful”, for example, Chi et al [7], Finegold and Mass [33]. The earliest physics problem solving study that focused on metacognition was Simon and Simon [41]. This study found that experts made fewer metastatements than novices, for examples “wait a while”; is that right?”. However, Malone [44] claimed that the problems given were very simple for the experts such that they probably had to do little planning, monitoring or evaluating of the problem solving processes. A recent study by Rosengrant, Van Heuvelen, and Etkina [45] demonstrated that experts employed metacognitive skills when solving electrical circuit problems. For example, experts would constantly turn their attention back and forth between their work on the circuit in the questions and on the circuit that they redrew. In constrast, novices were less likely to do this. Moreover, when experts finished their work, they would look over their entire work to check whereas the novices did not. There are also comparative studies between the so called “more successful” and “less successful”. Two studies in physics have compared “more successful” and “less successful” students [7, 33]. According to Chi et l. (1989) more successful students defined as those who achieved good rank at the top four and less successful those who achieve rank at bottom four. Finegold and Mass [33] referred the students as Good Problem Solver (GPS) and Poor Problem Solver (PPS). GPS were defined as students who excelled in problem solving and whose final graduating grades in Physics at least 90%. PPS were defined as students who experienced difficulties in solving problems and whose final graduating grades were above 60%. Finegold and Mass [33] found statistically significant differences between “more successful” and “less successful” in planning their solutions more fully and in detail before carrying them out. Further, significant differences were found that “more successful” students spent more time on translation and planning than “less successful” students [33]. The “more successful” students accurately monitored their comprehension failure compared to the “less successful” students [7], “more successful” students generated self-explanations more frequently than “less successful” students [7]. From all the studies above, it seems that comparisons are mostly made between experts and novices rather than between the so called “more successful” and “less successful” students. For this reason, the proposed study intends to compare problem solving between “more successful” and “less successful” students in physics. Studies of differences between “more successful” and “less successful” students are important because identification of such differences will make it possible to improve strategies employed by “less successful” students. According to Finegold and Mass [33], by comparing “more successful” and “less successful” students, studies can gain a better understanding of the scientific problem solving processes. In addition, the results from the differences can be used for developing instruction to enhance students’ problem solving skills [33]. The proposed study is different from that of Finegold and Mass [33] as a different approach to data gathering; while Finegold and Mass [33] used a quantitative approach, a qualitative approach was used in the present study. The importance of the proposed study is that it will be able to analyse the data in more depth than Finegold and Mass [33]. III. METHODOLOGY This study employed a qualitative research design and think aloud method was chosen to collect and analyse the data. Think aloud method was the most appropriate for this study because the method avoids interpretation by the subject and only assumes a very simple verbalization process. Secondly, the think aloud method treats the verbal protocols, that are accessible to anyone, as data thus creating an objective method [46]. This study consisted of 21 students, which all had a physics background at the university level. 10 students were involved in the first fieldwork and 11 in the second fieldwork. The purpose of the first fieldwork was to check the difficulty of the physics task (Physics Problem Solving Achievement Test) and to refine the coding schemes called Coding Metacognitive in the Thinking Aloud Protocol (CMBTAP). All of the respondents solved four physics problems in a physics pencil and paper test while talking aloud. The physics task is named Physics Problem Solving Achievement Test (PPSAT). The problems were given one by one to the respondents. The respondents were instructed to provide full solutions to each problem on the test paper. No time limitation were given for the respondents to answer the problems, however if the respondents show impasse in their work, it was suggested that they move to the next question. In the meantime, each of the respondents were videotaped. Interviews were conducted right after the test. During the interview, the respondents’ written answer to each of the problems were shown and the respondents were asked to discuss their recollection of their thinking when solving that problem. There are 5 levels of proficiency, excellent, good medium, weak and very weak (see table II). In any performance test on Malaysian examination usually, those who achieved less than 40% are considered weak and very weak (Table II). TABLE II. RANGE OF SCORES FOR DETERMINE THE LEVEL OF ACHIEVEMENT IN MALAYSIA EXAMINATION Range of Scores (%) 80-100 60-79 40-59 20-39 0-19 CLASSIFICATION OF MORE SUCCESSFUL AND LESS SUCCESSFUL STUDENTS No. Name 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. Adam Emma Ruby Isabelle Thalia Student a Student b Student c Student d Student e Student f Student g Student h James Student i Sophia Student j Georgia Jack Student k Olivia Fieldwork 2 1 1 2 1 1 1 1 2 2 2 2 1 1 2 1 2 2 1 2 2 Scores (%) 75.7 62.2 59.5 48.6 48.6 48.6 43.2 43.2 37.8 35.1 29.7 27.0 24.3 24.3 24.3 21.6 21.6 18.9 13.5 13.5 13.5 FINDINGS AND DISCUSSION Level of achievement Excellent Good Moderate Weak Very Weak Based on this preferences, 40% was chosen as the cut-off for differentiating between “more” and “less” successful [47]. Participants were then labelled accordingly. It was anticipated that not all participants will fall neatly into one of these two groups. Respectively, eight participants were classified as “more successful (MS)” and 13 participants categorised as “less successful (LS)”. The 10 students selected were assigned pseudonyms as Emma, Ruby, Adam, Isabelle, Thalia, James, Olivia, Georgia, Sophia and Jack while their real identities were kept anonymous. As shown in Table III, Ruby, Emma and Isabelle were chosen from first fieldwork. They were classified as top rank participants from the scores of the first fieldwork. Adam and Thalia were chosen from fieldwork 2 and were classified as top rank participants as well from the scores of the second fieldwork. When the score of the participants from both fieldworks were merged together, Adam, Ruby, Emma, Isabelle, and Thalia emerged as the top five. On the other hand, for “less successful” participants, James, Sophia and Jack were chosen from the first fieldwork. They were classified as the bottom participants from their score of the first fieldwork. Georgia and Olivia were chosen later and they were classified as the bottom rank participants as well as from the score of the second fieldwork. The criteria for selecting the students also looked at respondent’s cooperation during thinking aloud. Students who shows lacked of cooperation such as not trying to solve the problems and simply withdraw in answering the question also become criteria in selecting the students especially for less successful. TABLE III. IV. Age Gender 20 23 23 23 23 23 23 23 23 21 23 23 23 25 20 23 20 24 20 20 23 M F F F F M F F M F F F F M F F F F M F F Rating MS MS MS MS MS MS MS MS LS LS LS LS LS LS LS LS LS LS LS LS LS Fig. 1. Diagram of comparison between Emma (MS) and Sophia (LS) (First pattern) To identify the pattern, comparison were made between two persons, each one from the more successful (MS) and less successful (LS) group for the “lift” problem. Two students, one called Emma who was a more successful (MS) problem solver and Sophia who was a less successful (LS) problem solver, were selected as a benchmark based on overall perception that they differed in their level of metacognition. Then, the differences identified between the two persons is determined as the benchmark to compare between the two groups of “more successful” and “less successful” problem solvers for the “lift” problem. Then, comparison between the two groups in the “lift” problem is identified as the benchmark to determine the pattern for “car on the hill” problem and the process of comparison continues until all four problems is done. However, for the purpose of this paper, only patterns from the lift problem will be discussed. Emma and Sopia are the two persons compared in the first stage of the analysis. They are the benchmark for the comparison of the “more successful” and “less successful” problem solvers group in the lift problem. The differences between Emma (MS) and Sophia (LS) can be summarised as follows (Refer diagram in Figure 1): 1) In the early phase, Emma (MS) and Sophia (LS) showed similarity in terms of planning the problem. a. Sophia (LS) reread more than Emma (MS). b. Emma (MS) qualitatively analysed the problem and Sophia (LS) leapt to an equation. c. Emma (MS) figured out the goal of the problem much faster than Sophia (LS). d. Emma (MS) used “physics representation” while Sophia used “naïve representation”. e. Emma (MS) worked forward, while Sophia (LS) worked backward. f. Both of them drew a diagram; however, Sophia’s diagram lacked understanding of the problem. 2) In the middle stage, Emma (MS) did lots of monitoring, qualitative analysis and evaluating. Sophia (LS) also showed that she sometimes monitored her thinking. 3) At the end stage, Emma (MS) evaluated her answer while Sophia (LS) did not evaluate her answer. Pattern 2 was developed after differentiating between “more successful” and “less successful” groups in solving the “lift” problem using the benchmark formed by differentiating between Emma and Sophia. TABLE V. COMPARISON BETWEEN MORE AND LESS SUCCESSFUL IN MONITORING AND QUALITATIVE ANALYSIS More successful Adam Emma Isabelle Tahlia Ruby 1 6 1 1 4 Monitoring Qualitative Analysis Mark for “lift” Fig. 2 Diagram of comparison between more successful (MS) problem solvers and less successful (LS) problem solver from “lift” problem (2nd pattern) As might be expected, the difference in the pattern are not neat, however taken as a whole, the more successful problem solvers engaged more often in actions that can be labelled as metacognitive than the less successful group. In the early stage of problem solving, there were five differences between groups. Firstly, “more successful” problem solvers planned more often than “less successful”. Secondly, “less successful” problem solvers re-read more often than “more successful” problem solvers. Thirdly, drawing diagram is common among groups and both groups of solvers drew the free body diagram except Isabelle. Fourthly, the “more successful” qualitatively analyzed the problem more often than “more successful” problem solvers. Thirdly, drawing diagram is common among groups and both groups of solvers drew the free body diagram except Isabelle. Fourthly, the “more successful” qualitatively analyzed the problem more often than the “less successful” problem solvers. And fifthly, the “more successful” used “abstract concepts” more often than the “less successful” while the “less successful” used more “naive concepts” than the “more successful”. In the middle stage of problem solving, two differences between groups were identified. Firstly, two problem solvers from the “more successful” group were planning in the middle stages. The reason they planned for a second time was because they could not find a suitable solution and were also unconfident about the answer. Secondly, members of both groups demonstrated aspects of monitoring in solving “lift” problem, but there were differences between the groups. Based on table IV, the “less successful” group shows greater number of monitoring compared to the “more successful” group. On the other hand, the “more successful” group shows greater number in the qualitative analysis of the problem compared to the “less successful” group. Monitoring and qualitative analysis are basically interrelated. Based on this study, the “less successful” group demonstrated higher monitoring, but without qualitative analysis, it does not help the solver to solve the problem successfully. This finding also supports the study by Chi, et al. [7] where similar result was found. TABLE IV. 13 19 Qualitative Analysis 14 11 0 0 6/6 3/6 Sophia Olivia Georgia Jack Monitoring Qualitative Analysis 6 2 4 3 4 0 1 10 0 0 Mark for “lift” 1/6 1/6 2/6 1/6 2/6 V. James CONCLUSIONS As a conclusion, there were differences between “more successful” and “less successful” groups in solving physics problems. As might be expected, the difference in the pattern are not neat, however taken as a whole, the more successful problem solvers engaged more often in actions that can be labelled as metacognitive than the less successful group. ACKNOWLEDGMENT The authors would like to thank the Ministry of Education (MOE), Malaysia and Universiti Teknologi Malaysia (UTM) for their financial funding through FRGS Grant Vote No R.J130000.7831.4F427. REFERENCES [1] [2] [3] [4] [5] [6] Monitoring 1 6/6 Based on table V, almost every student shows monitoring during problem solving. However, lack of qualitative analysis among the “less successful” group caused them to fail to solve the “lift” problem [48]. At the end stage of the problem solving process, only one difference between groups was identified. 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