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This study aimed to develop, validate and administer an achievement test in organismal classification for grade 8 junior high school. In the development stage, the researchers followed the topics in the Philippine K to 12 curriculum guide for grade 8 science focused on taxonomy and systematics and these were the basis for the development of the achievement test. The developed Organismal Classification Achievement Test (OCAT) was validated by content experts in biology. The initial version of the instrument is 60-item test which was administered to grade 8 high school students. Reliability coefficient, (KR20), difficulty index and discrimination index were used to select which items were retained, revised or rejected. Result of pilot-testing retained 40 items in which 19 items were described as average to excellent items (x > 0.20) while 21 questions were described as items subject for revision (between 0.10 and 0.20) in terms of discrimination index.

international journal of biotechnology and recent advances

Development and Validation of Organismal Classification Achievement Test (OCAT): Basis for Implementation and Standardization for Test Construction in Junior Science High School