Development of scientific process-creative skills (SP-CS) test on light wave concept: Rasch model analysis
Royhanun Athiyyah (a*), Selly Feranie (a), Taufik Ramlan Ramalis (a)

a) Departemen Pendidikan Fisika, Universitas Pendidikan Indonesia, Jl. Dr. Setia Budhi No. 229 Bandung 40154, Indonesia

Abstract

Most creativity assessments are carried out in general fields, whereas creativity assessments in specific fields are rarely carried out. This study aims to develop a scientific creative skills test instrument that is integrated with a scientific process skills test instrument (SP-CS test) on the light waves concept. This study uses a mixed method with exploratory sequential design. The research procedure consists of five stages including analyzing, designing, developing, implementing, and evaluating. The initial draft of SP-CS test consisted of 21 multiple choice scientific process skills (SPS) questions and 15 open-ended scientific creative skills (SCS) questions. Scientific Creative Skills (SCS) test instrument developed based on the Scientific Creativity Structure Model compiled by Weiping Hu and Philip Adey. The results of the expert judgement were analyzed using the content validity index (CVI) and obtained a value of 0.75 (very suitable) for the SPS instrument and 0.60 (suitable) for the SCS instrument. After being revised based on the expert suggestions, the test instrument was tested on 33 students (20 girls,13 boys) aged 17-18 years. The trial data were analyzed using the Rasch Model. The results of the analysis show that 19 SPS items and 14 SCS items had item fit and distinction level. Furthermore, the item reliability of the SPS instrument is 0.79 (sufficient) and the SCS instrument is 0.91 (very good). Therefore, the SP-CS test is valid and reliable so that it can be used to measure scientific process skills and scientific creative skills of students in further research.

Keywords: Scientific Creativity-Scientific Process Skills-Light Wave-Test Instrument- Rasch Model

Topic: Physics Education