Profile of Cybernetic Thinking of Students in Mathematical Problem Solving Based on Serialist and Holist Thinking Style

Received : 10-06-2020 Revised 1 : 13-07-2020 Revised 2 : 15-09-2020 Accepted : 16-09-2020 Online : 03-10-2020 This research aim to describe the profile of cybernetic thinking of students in solving algebra problems. This research is a descriptive study with a qualitative approach using questionnaires, written tests, and interview guidelines. Intake of subjects who have Serialist and Holist thinking styles have done using purposive sampling. The results showed students who have the Serialist thinking style at the time of the Sensory Register's attention and good perception so that information stored in Short Term Memory. Retrieval done well even when rehearsal has difficulty because of forgetting certain concepts, but information has been stored well in Long Term Memory. The encoding done well. While students who have Holist style of thinking lack attention and perceptions are not structured so that information is not stored correctly in Short Term Memory. So that retrieval can not be done correctly. Therefore during rehearsal, they have difficulty in applying the settlement method because the information is not stored correctly in Long Term Memory. Keyword:


A. INTRODUCTION
The results of Trends in International Mathematics and Science Study (TIMSS) in 2015, Indonesian students in solving mathematical problems are still far from the international. Indonesian students are still unable to solve problems in the low category (Annajmi, 2018) (Lailiyah et al., 2018). Indonesian students are still unable to solve problems in the low category. One of the mathematical problems is algebra material that is one of the subjects considered difficult for students (Kieran, 2004;Saul, 2008).
The inability of students to solve algebraic problems is the biggest weakness of students in learning algebra material, namely writing down the notions of tribes, variables, and constants (Ma'Rufi et al., 2017). The same thing was stated by (Jupri & Drijvers, 2016) that students experience difficulties because algebra is required to do reasoning or abstract thinking related to ethnicity, variables, and constanta (Kusaeri, 2012). Therefore, students are a failure in solving algebra problems caused by students failing to memorize, process, and implement solving can assume as a process where students associate between a combination of rules that they have learned first and then used to solve new problems. But solving the problem is not only to apply for a known but also to try finding new knowledge (Abdullah, 2018). While solving mathematical problems is a process carried out by students to solve mathematical problems using the knowledge and understanding they have (Indah et al., 2016).
Stages in the activities of students' thought processes in solving mathematical problems divided into four stages, including (1) Receiving information, (2) Processing information, (3) Saving information, (4) Calling information back (Liljedahl et al., 2016;Rahman & Ahmar, 2016). Pask and Scott (1973) distinguish two types of thinking. First, serialist is a type of thinking that tends to use a local approach and concentrate on various topics separately before building connect each subject. Second, Holist is a kind of global thinking, examining the interconnectedness of several materials from the beginning of the learning process, and concentrating on building an overall picture of an issue at the beginning of the process (Clewley et al., 2011). One of the cybernetic theory figures is Pask and Scott (1973). According Clewley et al., (2011) there are two styles of thinking of students in the Cybernetics theory, namely the Serialist style and the Holist style. Serialist style students usually have something in common like algorithmic thinking. The Holist style tends to learn something from the generalization stage to a specific (Pane & Darwis Dasopang, 2017).
The cybernetic theory is present as an alternative solution to the failure of students to solve problems caused a failure in processing information, and Cybernetic theory can improve the ability to solve problems. Therefore, the purpose of this study is to describe the cybernetic thinking profile of students in solving mathematical problems according to the Serialist and Holist thinking styles.

B. METHODS
This research is a descriptive study with a qualitative approach. The research method in the form of a description of a situation or event, written or oral words, sentences, images, and behavior that observed and directed at the individual's scientific background as a whole (Nazir, 2009). This research has conducted at SMPN 2 Taman Sidoarjo. The data collection process has carried out on Grade VIII as many as 30 students who had get algebra material. The subjects chosen using a purposive sampling technique attention to students' communication skills and accepting the results of input and information from the teacher (Noor, 2016). The students chosen were students who were able to express their ideas or opinions well and finish answers from the subject. How to get the subject of research? Researchers provide a learning type questionnaire that is useful for classifying students who have Serialist and Holist thinking styles by making 20 statements. Based on these items two students have selected who had Serialist thinking styles and two students who had Holist thinking styles. In addition to using a questionnaire, researchers conducted interviews with subjects related to students' thinking styles both in writing and orally so as not to influence the results of this study. The students selected the following Table 1. The techniques used in collecting data are: (1) Thinking Questionnaire Technique, (2) Cybernetic Thinking Writing Test Techniques, (3) Interview Techniques. While the supporting instruments are: Questionnaire Thinking Style, Writing Test Thinking Cybernetic, and Interview Guidelines. Questionnaire technique is many written questions that use to obtain information from the respondent, in the sense of a report about his personality or things he wants to know (Ingleby, 2012) (Charters, 2003).
In this study, the validity test has carried out using triangulation techniques, which are different data collection techniques to get the same data source. The analysis techniques are Analysis of the results of the questionnaire style of thinking, written test of Cybernetic thinking, and interview. Activities in data analysis are reduction, display, and conclusion/verification. The research procedures carried out included four stages, including (1) The preparation phase, (2) The implementation phase, (3) The data analysis stage, and (4) The report preparation stage (Sugiyono, 2018).

C. RESULT AND DISCUSSION
The data presented were obtained from research conducted on two subjects who have Serialist thinking styles and two students who have Holist thinking styles. They were given by a written test to identify their cybernetics thinking. They must fill out the questionnaire that had provided and do a written test, after which interviews conducted on each research subject. Following is the description of the Cybernetics thinking profile of students who have Serialist thinking styles in solving mathematical problems.

S1 S2
Sensory Register S1 has received information in the form of mathematical problems in the SPLDV material by understanding and rereading the question, then determining some components to link in solving the problem. Shows that the subject stores information in the Sensory Register (sense of sight). The Attention Process carried out by S1 is by sorting out the information contained in the questions. S1 can explain the problem that is known and is sufficient to understand the information provided in the questions. The Perception process carried out by S1 is to determine what material is related to the problem given and how to solve the problem or what strategies will be used to obtain the correct problem-solving.
S2 has received information in the form of mathematical problems in the SPLDV material by understanding and read the question more than once. Based on this analysis shows that S2 stores information in the Sensory Register. The Attention Process conducted by S2 is by sorting out the information contained in the questions. S2 reveals what is known, asked from the explanation of the picture that has given. S2 has sorted out information by mentioning or writing down what is known and asked about the problem. The Perception process carried out by S2 in resolving a given problem is by first changing it into a linear equation.

Conclusion
The cybernetic thinking profile of students with the Serialist thinking style begins with the entry of information into the Sensory Register by observing images and reading the questions given. The process of attention to the question done to sort out information and reveal what is known and asked. The Perception process determines what material is related and how to solve the problem or what 126| JTAM (Jurnal Teori dan Aplikasi Matematika) | Vol. 4, No. 2, October 2020, pp.122-132 Components of Cybernetic Theory S1 S2 strategies will use to obtain the correct solution. Short Term Memory S1 has stored information in Short Term Memory by performing the problem-solving process in the form of a calculation after the attention information given. S1 can describe the process of elimination and substitution and number operations (addition, subtraction, multiplication, division) quite well so that concluding is also correct.
The process of retrieval carried out by S1 in solving problems using the knowledge that has been previously obtained by linking that knowledge in overcoming questions received following related material. The Rehearsal Process carried out by S1 by linking the calculations previously carried out when using the elimination and substitution methods. S1 has rewritten information or answers that have written before. S1 has repeated the results of previous work. S1 associates the calculation results when using the elimination and substitution methods.

S2 has stored information in Short Term
Memory by performing the problemsolving process in the form of a calculation after the attention information given. S2 can describe the process of elimination and substitution as well as number operations (addition, subtraction, multiplication, division) quite well so that concluding is also correct. Retrieval process carried out by S2 in solving problems using the knowledge that has obtained previously. The subject associates the information in overcoming the problem received following the related material. The Rehearsal process carried out by S2 links the calculations previously carried out when using the elimination and substitution methods. S2 has repeated the results of previous work. S2 linked the calculation results when using the elimination and substitution method. S2 has rewritten information or answers that have written previously.

Conclusion
Students with the Serialist thinking style have stored information in Short Term Memory by doing the problem-solving in the form of a calculation after the attention information given. Retrieval processes carried out in solving problems by using or linking knowledge that has been obtained previously in overcoming the question received. The Rehearsal process carried out to rewrite information or answers that have written before.

Long Term Memory
After the information processed in the Short-Term Memory, either new information entered or old memory that recalled, then some information will be stored again in the Long-Term Memory. The process of storing into Long Term Memory can be known when the subject is encoding. The results of the Encoding process show that S1 can good explain the problem-solving process that has done. S1 has also rechecked the truth of the answer so that it gives the correct result.
After the information processed in the Short-Term Memory, either new information entered or old memory that recalled, then some information will be stored again in the Long-Term Memory. The process of storing into Long Term Memory can be known when the subject is encoding. The results of the Encoding process show that S2 has become accustomed to solving these problems in carrying out the number of operations as well as the elimination and substitution methods contained in the SPLDV material. S2 also had difficulty in the retrieval of Long-Term Memory related to the settlement method. But S2 was able to overcome it because it still remembers the way the

S1 S2
teacher worked on the explanation he had received. S2 can explain in a structured process the problem solving that has done. The subject has also rechecked the truth of the answer so that it gives the correct result.

Conclusion
Students with the Serialist thinking style save goods concepts in Long Term Memory to be applied to Short Term Memory when needed to solve problems and can explain the answers that have done. The encoding process that done already feels accustomed to solving problems and still can remember the way of working from the teacher's explanation that he had received. Summary Cybernetic thinking profiles of students who have Serialist thinking styles in solving mathematical problems based on components of Cybernetetic theory begin with the entry of information into the Sensory Register by correcting pictures and reading the questions. Attention and Perception processes can carry out well so that information stored in Short-Term Memory. The Retrieval Process can do well after that, the rehearsal process increases the difficulty of students replacing forgetfulness for concepts. It needed Short-Term Memory to solve the mathematical problems that have stored in students' Long-Term Memory. The coding process is correct so that it answers correctly.
Following is the description of the Cybernetic thinking profile of students who have Holist thinking styles in solving mathematical problems. S4 stores information in the first repository of information the Sensory Register (the sense of sight and sense of hearing) with reading and understanding images repeatedly that have been read by researchers. The Attention Process carried out by S4 is by sorting the information in the problem. S4 shows only giving values to buildings that have dotted lines on tower III and writing down the unity value of the flat structures that make up the section. The Perception process carried out by S4 in determining what material is related to a given problem and how the subject will solve the problem or what strategies will use to obtain the correct solution to the problem. S4 does not use structured methods as used by most of his friends. S4 only looks at the picture in the question, then makes calculations with the reasoning that is useful for knowing the answer to the 128| JTAM (Jurnal Teori dan Aplikasi Matematika) | Vol. 4, No. 2, October 2020, pp.122-132 Components of Cybernetic Theory S3 S4 problem given.

Conclusion
Cybernetic thinking profile of students with Holist thinking style begins with the entry of information into the Sensory Register (the sense of sight and sense of hearing) by observing images and reading the questions given and when listening to the researchers' explanations. The attention process is to do only modestly. The Perception Process is not structured. Short Term Memory S3 has stored information in Short Term Memory in the form of knowledge or concepts needed in solving problems related to how to determine the number of rectangles in tower III. but it is not good. S3 does not use the formula in its solution but only uses reason and uses calculation operations that have obtained.
The Retrieval process carried out by S3 experienced forgetting to remember the same problem and had been explained by the mathematics teacher before. So S3 uses his way to solve the questions obtained. It shows that the subject only associates knowledge about the calculation operations without linking the methods that have been explained by the teacher before solving problems. The Rehearsal process carried out by S3 in the process of finding the number of rectangles in tower III, by linking the calculations previously carried out at the initial stage, namely the calculation operation that reduces the height of tower I to tower II. Then S3 performs the calculation operation of tower III height reduced by the total number of known building values on tower III. So, from the results of the analysis, S3 found the number of rectangular buildings in tower III in a phased manner from the initial calculation. Based on this analysis shows that S3 has rewritten information or answers that have written previously.

S4 has stored information in Short Term
Memory. S4 can describe the process of solving mathematical problems as well as performing number operations (addition, subtraction, multiplication, division) quite well, even though it uses a method that is not quite right. The conclusions drawn are appropriate. The Retrieval process carried out by S4 uses reasoning in solving problems. By measuring the unit value of each known rectangle, then linking when calculating the number that will be attached to tower III. The method used is to divide the height of the building contained in the dotted line by the known square unit value. The Rehearsal process carried out by S4 in the process of looking for the number of rectangles in tower III, by linking the calculations previously done at an early stage is to measure with the help of a unit value ruler from the rectangular building on the tower I and tower II. So from the results of the analysis, S4 found the number of rectangular buildings in tower III by stepwise from the initial calculation, then proceeded to divide the height of the building that has the dotted line by the unit value of the previous rectangle. After doing calculations, S4 found the number of rectangular in tower III is 6. it is means S4 has rewritten information or answers that have written previously

Conclusion
Students with Holist thinking style are not good at storing information into Short Term Memory were in the process of solving using other methods that are not following the material and reasoning in solving the problems given and doing a calculation in solving the problem. The Retrieval process carried out had forgotten

S3 S4
to remember the same problem and had been explained by the mathematics teacher before and only used his reasoning. The Rehearsal process carried out had difficulty in implementing the settlement method because it was caused by forgetting.

Long Term Memory
After the information processed in the Short-Term Memory, either new information entered or old memory that recalled, then some information will be stored again in the Long-Term Memory. The process of storing into Long Term Memory can be known when the subject is encoding. The results of the coding process carried out by S3 showed that S3 was familiar with the structure of the question, both what believed and asked, but used other methods to solve it without using formulas or methods following the material provided. S3 is less able to explain the question problem-solving process that has done.
After the information processed in the Short-Term Memory, either new information entered or old memory that recalled, then some information will be stored again in the Long-Term Memory. The process of storing into Long Term Memory can be known when the subject is encoding. The results of the Encoding process carried out by S4 already feel familiar with the structure of the problem, both what is known and asked about the question, but used other methods to solve it without using formulas or methods following the material provided. S4 is less able to explain clearly the problem-solving process that has done because it uses a less precise way.

Conclusion
Students with Holist thinking style are not good at storing concepts in Long Term Memory to be applied to Short Term Memory when needed to solve problems and are less able to explain the answers that have done using the wrong method. in the encoding process they feel familiar with the structure of the question, but have difficulty in using the formula or the appropriate way. Therefore, they used another way.

Summary
Cybernetic thinking profile of students who have a Holist thinking style in solving mathematical problems based on components of Cybernetetic theory begins with the entry of information into the Sensory Register (senses of sight and sense of hearing) by images and reading the given problems and listening to the researchers' explanations. The attention process that done only modestly and the Perception process that done does not use a structured way so that the information not stored in the Short-Term Memory. The retrieval process had forgotten to remember the same problem and explained by the math teacher before. They have used his reasoning. The Rehearsal process that carried out had difficulty in applying the method of settlement because it was caused by forgetting. The information was not well stored in Long Term Memory. The encoding process carried out using other methods to complete without using a formula or method that is following the material provided due to difficulties in remembering it.
Cybernetic thinking profile of students who have the Serialist thinking style in solving algebra problems begin from the presence of information or stimulus in the form enter the Sensory Register through the sense of sight by reading questions. It is following the research of Amamah et al. (2016) that information entered into the Sensory Register based read activities. Then students have attention and perception. Students who have the Serialist style of thinking make attention by sorting out information that is on the problem so that the formation is focused. Prinz in (Rehalat, 2016) has the same opinion attention is some information meaning to new information, and connected to existing knowledge. Perception will be realized by students when doing the problem-solving process in Short Term Memory by doing the retrieval. Thus, students also have experienced forgetting to do a Retrieval of a particular concept because forgetfulness is at risk for waste. Students who have the Serialist thinking style in understanding concepts more associate the knowledge they have previously obtained, and the problem-solving material provided, students have experienced forgetting of particular concepts because students use memorization methods in learning (Clewley et al., 2011). Understanding concepts of students often use procedural abilities and are at risk of experiencing waste due to difficulties in carrying out retrieval on a particular. Pask (1976) said students who have Serialist thinking styles tend to use local approaches and concentrate on various topics separately first before building interest between material. From these results, it shows that the components of information storage and cognitive processes of students who have Serialist thinking styles are functioning well even though there has been a portion of memory lost in solving mathematical problems.
Cybernetic thinking profile of students who have a Holist style of thinking in solving mathematical problems starts from the presence of information or stimulus in the form of questions given by researchers who enter the Sensory Register through the senses of sight and hearing. Students who have a Holist style of thinking do different thought processes. The thinking process starts with information in the form of questions. Students who have the Holist thinking style receive information by reading the questions and listening to the explanation given by the researcher. Then the information in the form of the problem is entered into the Sensory Register. Based on research by (Ngilawajan, 2013), information entered into the sensory list through reading or listening activities. Reading activities carried out indicate that these students have used their sense of sight to understand while listening activities to record information received. The ability of students to solve mathematical problems influence by several things, including the ability of students to identify everything known in the question given as capital to determine strategies and initial steps.
The same opinion was conveyed by Gagné (1975) that an individual's ability to identify a given problem affects the experience and knowledge of the individual. Students pay attention and give perception. Students complete the process and experience errors in using the appropriate concepts due to forgetfulness and have other ways to solve problems that stored in Long-Term Memory. As a result, the response in the form of answers given by students is not quite right but also has good value due to chance because there are other ways to solve the problem. That is because the concepts needed Short Term Memory are not well stored in Long Term Memory. Students often experience errors due to forgetfulness and the risk of overgeneralizing.
The Holist style of thinking in problem-solving slightly relates prior knowledge due to frequent failures in recalling. They Solve many problems using reasoning and not to use the concept according to the material given along a piece of information stored in Long Term Memory. Students use descriptive skills because some of them only a few are stored in Long Term Memory. Refers to Pask (1976) that students who have a Holist thinking style tend to use a global approach and examine the interests of various topics since the beginning of the learning process and concentrate on building a comprehensive picture of a problem at the beginning of the process.

D. CONCLUSION AND SUGGESTIONS
Based on the results of data analysis and discussion, it can be concluded that: (1) Cybernetetic thinking of students who have Serialist thinking style in solving algebra problems begin from the information that goes into the Sensory Register and performs Attention and Perception well. So, that information stored well in Short Term Memory and do Retrieval well even though Rehearsal has difficulty because students experience forgetting of certain concepts so that information is stored well in Long Term Memory and Encoding properly so that responses in the form of answers given are correct; (2) Cybernetetic thinking of students who have Holist thinking style in solving algebra problems begin from the information that enters the Sensory Register, attention and poorly perception and does not use a structured way. So, that is less well stored into Short Term Memory and Retrieval experience forgetting to remember the same problems and have been explained before and only using their reasoning and Rehearsal which have difficulty in applying the method of resolution. Because it is caused to forget so that the information is not well stored in Long Term Memory and encoding which is carried out using other methods to solve without a formula or way that is in accordance with the material given due to difficulties in remembering it. The researcher suggestions to teachers, such as must teach methods that make students not only memorize but also pay more attention to students' diverse thought processes even though they do not follow them. Besides that, the teacher also pays attention to the students' initial abilities that are stored in long term memory.