The computer-assisted testlet assessment instrument to measure students' learning difficulties in chemical bonding

Abstract

Many students assume that the chemistry subject is difficult. We create a Testlet Aassessment Instrument (TAI) as a diagnostic tool that can be used to detect students' level of difficulty in learning chemistry. Hence, this study aims to analyze the computer-assisted TAI to measure students' learning difficulties in the chemical bond subject matter for class X students of the senior high school in Madiun of East Java Indonesia. This study used descriptive-quantitative analysis methods and15 students from 3 different schools as participants. The computer-assisted TAI consists of 10-question stems, that's stem 1 until stem 10. The result showed that for stem 8 only 4% students can answer correctly and thus the stem is considered the most difficult. Scoring of the TAI used graded scoring with 4 categories. The implication for applying the computer-assisted TAI for measuring students' difficulties in chemical bonding subject was discussed.