Evaluation of The Validity and Reliability of Biology Learning Instruments at SMA Negeri 6 Bantaeng

Abstract

This study aims to evaluate the quality of a multiple-choice Biology learning achievement test instrument through validity and reliability tests. The method used was quantitative descriptive, with 20 grade XII students of SMA Negeri 6 Bantaeng as research subjects. The research instrument consisted of 20 multiple-choice items. Item validity was tested using Pearson Product Moment correlation, while reliability was calculated using the KR-21 formula. The results showed that 11 items (55%) were declared valid with a correlation coefficient ≥ 0.602, and 9 items (45%) were invalid. The instrument's reliability coefficient of 0.82 was classified as very high. The study concludes that the evaluated Biology learning assessment instrument has excellent reliability; however, revision of the invalid items is required to enhance the quality of measurement. The development of valid and reliable instruments is crucial for supporting learning effectiveness and the accuracy of learning outcome assessment.