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The study aimed to evaluate the Advanced Progressive Matrices (APM) with a Rasch analysis to enhance the precision of the instrument. Accurate assessment of a student potential ability is essential for the timely provision of guidance and counseling support. The Advanced Progressive Matrices (APM) is an ordinal measure possessing acceptable psychometric properties, but its ability to discriminate precisely between individual potential levels has not been rigorously investigated. The quantitative approach involved respondent of 12,343 students in West Java, Indonesia. The data analysis used the partial credit Rasch model. This study uses Raven's Advanced Progressive Matrices instruments. The results of this study which are achieved through Initial analysis supported the use of the Rasch model and acceptable reliability (Alpha Cronbach= 0.85) was observed. Person reliability is 0.86, item reliability is 1.00. Local dependency between items through the creation of super-items increased model fit, person separation index = 2.35, and unidimensional. In fit and outfit statistics, all items satisfied the criterion for construct validity. Almost all items except 17, 21, and 36 had suitable point-measurement correlation, reflecting content validity. Item characteristic curves indicated that roughly 36 items were evenly distributed along the person ability continuum. The modified APM showed excellent reliability for a measure in assessing the overall potential ability of the students. The item would be added related to the person ability estimates. And several items should be omitted to ensure construct validity. Practically, APM is still relevant to assess the potential ability.

Year after year, the rate of violence among students rises. This is a conundrum because the phenomenon has already began to appear in high school. It is uncommon since a violent culture has a direct influence on students' academic success as well as several non-academic psychological characteristics. The study aimed to validate and develop a peaceful classroom scale. This study took place in Indonesia between 2020 and 2021, with 406 junior high school students (176 men and 230 females) participating by simple random sampling. A quantitative research methodology was used to analyze a survey design that distributes 25 items on a 5point Likert scale. The data analysis used the common factor analysis technique and Rasch model, "i.e.," Winsteps software version 3.73. Study results show 24 valid items, and the answer choices can be 4 or 7 points. As the representation of interaction between the person and the items as a whole, the Cronbach Alpha value is 0.94, which is in the excellent category. Furthermore, the person dependability rating is 0.82, which falls into the very good category as a reflection of the consistency of the participant's responses. This scale meets the criteria because it already has good psychometric properties so that it can be used to investigate peaceful classrooms at the junior high school level.

Background: This study was motivated by a large number of students who feel anxious when dealing with mathematics, which is an unpleasant feeling characterized by the presence of worry, anxiety, confusion, and stress. Objective: This study aims to test the instruments of mathematical anxiety using Rasch Model analysis. Materials and Methods: The study used descriptive analysis with a cross-sectional design. Subjects of the study were elementary school students in grade VI SDN Margarahayu, 13 male and 5 female students in grade VI A, 9 male and 3 female students in grade VI B. Results: The results of the analysis show that the instrument has a poor or not maximum reliability value (α = 0.56). Likewise, the respondent's reliability value (α = 0.49) is in the weak category and the item reliability (α = 0.93) is in the excellent category. Conclusion: The analysis of the instrument shows that 2 items do not meet the standard criteria for the measurement, including number 16 as bias genders are more profitable for female students, and number 9 misfits because it is too difficult for most students to agree on. 3 items are categorized as very difficult, including item number P13, P11, and P12. There are 5 items in difficult category, which include numbers P9, P15, P14, P16, and P10. There are 4 items in the easy category, including P6, P5, P4, and P3. While the very easy category has 4 items, including numbers P1, P7, P2, and P8.

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This study was conducted to analyze the construct validity of the Indonesian creativity scale developed by the Integrated Services Unit for Guidance and Counseling Services at the Indonesia University of Education, Indonesia. The research sample was 500 elementary school students in Indonesia, with 22 samples in West Java, Indonesia. This study employed a quantitative approach and a descriptive method with a survey design as the research method. Data were analyzed using the Rasch model using Winstep version 5.1.4. The analysis results show that the interaction between respondents and items is included in the very good category. The respondent’s reliability value which shows the consistency of the respondent in filling out the instrument is included in the very good category. The reliability of the instrument shows that it is in the very good category. However, the unidimensionality of the instrument indicates that the instrument is still not perfect for measurement. In addition, four items do not meet the measurement standards, which have a logit value that is greater than the average value after being added to the standard deviation value, and some item which has a bias in the gender category. It is hoped that with the results of this study, the Indonesian creativity scale instrument can be evaluated and developed so that an accurate instrument is obtained in measuring the creativity of elementary school students.