Analisis Kualitas PMPV-IG Berbahasa Ibu untuk Menganalisis Kemampuan Pemecahan Masalah Siswa pada Konsep Gerak Parabola

Abstract

The purpose of this study was to examine the quality of the Projectile Motion Problem Video–Interview Guide (PMPV-IG) developed in the mother tongue, focusing on aspects of validity and reliability. The PMPV-IG was designed to explore students’ problem-solving abilities in the concept of projectile motion within sports-related activities. Fifteen eleventh-grade students whose mother tongue is the Ketapang Malay Dialect (BMDK) were selected using a purposive sampling technique. The PMPV-IG was constructed based on the five problem-solving stages proposed by Heller’s theory: visualizing the problem, describing the problem in terms of physics, planning a solution, executing the problem-solving plan, and evaluating the solution. Its validity covered three aspects: content validity of the use of the Ketapang Malay Dialect, content validity regarding the alignment between indicators and essential questions, and construct validity. The construct validity was assessed using Aiken’s V formula, while the reliability of the PMPV-IG items was measured using Cronbach’s Alpha formula. The evaluation was conducted by two language experts and three physics experts. The findings indicate that the PMPV-IG achieved a very high level of validity, with an average score of 0.875, and demonstrated high reliability with an alpha value of 0.81. Therefore, the PMPV-IG is deemed valid and reliable, making it suitable for exploring students’ problem-solving abilities in the concept of projectile motion.