Construction and Validation of Biology Assessment Test (BAT) for Junior High School Students

This test development study aims to develop and validate an achievement test in Biology designed for junior high school completers. Test items were pooled from selected lessons in Biology. The researchers prepared a table of specification (TOS) and subjected the102- item multiple choice type of examination to validation by experts. After the initial validation, the test had 88 items that were pilot tested among 172 grade 11 students at a private university. The researcher did item analysis which classified 67 items as "average," 21 as "hard," none as" easy," 10 as "very good", 12 as "good," 19 as “fair” and 47 as "poor." Consistency and reliability were obtained using Kuder-Richardson (KR) 20. A total of 22 items were retained of the 88 based on validation and item analysis. Three items that were initially classified as "fair" and with "marginal" difficulty index were revised to produce a 25-item final version of the Biology Achievement Test.