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Vera, Rosi
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Using the Rasch Model to Develop a Measure of Students’ Problem Solving Ability in Optical Instruments Vera, Rosi; Kaniawati, Ida; Utama, Judhistira Aria
Jurnal Pendidikan MIPA Vol 24, No 2 (2023): Jurnal Pendidikan MIPA
Publisher : FKIP Universitas Lampung

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This study aims to develop a test instrument for problem-solving abilities in the material of optical instruments. The research method used is the development of a 4D model consisting of defining, designing, developing, and disseminating. Participants in this study consisted of 75 consisting of 40 males and 35 females in grade 12 high school sciences program at a high school in Bandung. Based on the results of the analysis, it was obtained: (1) expert validation with a CVR index value of 1 and the test instrument included in the valid category, (2) construct validation using Rasch was declared valid, (3) the reliability of each item using Rasch analysis was declared reliable with Cronbach alpha of 0.96, and (4) the difficulty level of the items is evenly distributed at each level of difficulty. Therefore, the test instrument that has been developed can measure students' problem-solving abilities in the material of optical instruments. Keywords: pemodelan Rasch, problem solving ability, optical instruments. DOI: http://dx.doi.org/10.23960/jpmipa/v24i2.pp419-431
MoIP-ST: An Instrument to Measure Students’ Problem Solving Skills on Momentum and Impulse Astuti, Itsna Rona Wahyu; Kaniawati, Ida; Samsudin, Achmad; Suhendi, Endi; Supardiyono, Supardiyono; Suparman, Andreas; Hegarna, Rona; Vera, Rosi
Jurnal Pendidikan MIPA Vol 23, No 4 (2022): Jurnal Pendidikan MIPA
Publisher : FKIP Universitas Lampung

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This research aims to develop the MoIP-ST (Momentum and Impulse ProblemSolving Test) instrument to measure students' problem-solving abilities according to the stages of problem-solving skills. The research method used is 4). The research participants were 64 students, consisting of 32 rural and 32 urban 10th-grade students in East Java, who were randomly selected. The first analysis is a multi-rater Rasch measurement based on the results of expert validation, which indicates that item I1 needs improvement. The second analysis is the analysis of the MoIP-ST instrument using the Rasch model, which shows that overall the items on the MoIP-ST are valid and reliable with a Cronbach Alpha of 0.87. The third analysis is the use of the MoIP-ST, which shows that the problem-solving ability of rural students is lower than that of urban students. Student problem-solving needs to be improved through models, methods, learning models, and teaching materials that support problem-solving.Keywords: test instrument, problem solving skills, physics learning.
Co-Authors Achmad Samsudin Astuti, Itsna Rona Wahyu E. Suhendi Hegarna, Rona Ida Kaniawati Judhistira Aria Utama Supardiyono Supardiyono Suparman, Andreas