PENGUJIAN KEMAMPUAN MENGINTERPRETASIKAN GRAFIK KINEMATIKA CALON GURU FISIKA: THE POLYTOMOUS RASCH ANALYSIS

ABSTRAKKemampuan interpretasi grafik merupakan kemampuan yang sangat penting dan kunci utama dalam memahami materi kinematika dan materi fisika lanjutan. Namun kemampuan interpretasi grafik materi kinematika mahasiswa calon guru masih rendah. Tujuan penelitian ini menguji kemampuan membaca dan menginterpretasikan grafik kinematika calon guru dengan analisis polytomous rasch model. Instrumen terdiri dari empat soal uraian menyajikan grafik kinematika. Tes diberikan ke 20 mahasiswa calon guru, terdiri dari 14 perempuan dan 6 laki-laki. Metode yang digunakan survei deskriptif kuantitatif dengan analisis menggunakan rasch model dengan data politomi. Hasil yang diperoleh nilai reliabilitas 0,58 kategori lemah, tingkat kesukaran untuk 3 soal dalam kategori sukar dan satu soal kategori mudah, daya pembeda berkategori sangat baik untuk seluruh soal. Kemampuan membaca dan menginterpretasikan grafik kinematika secara keseluruhan cukup baik. Kesimpulannya instrumen dan analisis yang digunakan dapat menguji kemampuan menginterpretasikan grafik kinematika calon guru. Kata kunci: interpretasi; grafik, kinematika; polytomous rasch. ABSTRACTThe ability to interpret graphs is a very important ability and the main key in understanding kinematics and advanced physics materials. However, the ability to interpret graphs of prospective teachers is still low. The purpose of this study is to test the ability to read and interpret the kinematic graphs of prospective teachers using polytomous rasch model analysis. The instrument consists of four essay questions presenting a kinematic graph. The test was given to 20 prospective teachers, consisting of 14 females and 6 males. The method used is quantitative descriptive survey with analysis using the rasch model with polytomous data. The results obtained were the reliability value of 0.58 in the weak category, the level of difficulty for 3 questions in the difficult category and one question in the easy category, the distinguishing power was very good for all the questions. The overall ability to read and interpret kinematics graphs is quite good. In conclusion, the instruments and analysis used can test the ability to interpret the prospective teacher's kinematics graph. Keywords: interpretation; graph; kinematics; polytomous.

Exploring the Factor Structure of Environmental Attitudes Measure in a Sample of Indonesian College Students

The purpose of this study was to validate and evaluate the factor structure of the instrument for measuring attitudes towards the environment using factor analysis and multidimensional polytomous Rasch model. Participants in this study were 595 Indonesian university students (293 male and 302 female) with an age range of 18-24 (mean age = 21.01, SD = 1.65). The 22-items of Environmental Attitudes Measure were administered using online survey systems. This study generates a three-dimensional factor structure of environmental attitudes in the Indonesian college samples and supports the original scale's theoretical basis. The results of the multidimensional analysis of the polytomous Rasch model show that the psychometric characteristics of this instrument are excellent and have high separation reliability, both for items and person. The findings of this study can be used in future research to examine the interrelationship of environmental attitudes with other variables in the Indonesian sample. Limitations of this study are also discussed.