Developing a Four-Tier Diagnostic Test to Identify Students^ Conception on Light and Optic Topic
R A H Putri (a*), A Widodo (b), and L Rusyati (a)

(a)Departement of Science Education, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudhi No. 229, Bandung 40154, Indonesia
*rossyandini[at]upi.edu
(b) Departement of Biology Education, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudhi No. 229, Bandung 40154, Indonesia

Abstract

Students conception is very important. It affects students^ understanding, students^ achievement, and how they relate the concept to other concepts in science. The aim of this study is to develop a four-tier test to diagnose students^ conception on light and optic topic. Four-tier test is a multiple choice question consist of main question, certainty index for the answer, reason, and certainty index for the reason. Light and optic topic is chosen because it is very close to students daily life and it is an essential topic at school. This study involves 93 students of grade 10. The instrument was developed from a list of indicator on light and optic topic. Once the instrument was constructed, it was tested and analysed using SPSS. The instrument undergoes two stages of validity and reliability test. The first test showed there are 13 out of 19 questions that are valid and reliable with 0.740 Cronbach^s Alpha. The remaining 6 questions were then revised and retested to 21 students of grade 10. The result showed the 6 questions are valid and reliable with 0.829 cronbach^s alpha. From this study there are 19 questions that are feasible to diagnose students conception on light and optic topic.

Keywords: Diagnostic test- Four-Tier Terst- Light and Optic- Misconception

Topic: Physics Education