In our 21st century workplace, nations' need to acquire essential learning skills in a knowledge-based society. Idea generation is a thinking skill activity that requires a high degree of thinking and action. Higher Thinking (HOT) is one of the most desirable traits for educational and professional success in this era. Higher thinking helps students to excel in learning and living. This study focuses on the development and validation of higher order thinking abilities in the 10th grade biology test (HOTAT). This study consists of five steps (content selection, table specification, test validation, pilot testing, results and analysis, discussion and recommendations of test). Initially, 50 items are inductive and include expert-verified facial validity, content validity, construct validity, criteria validity, and item difficulty statistical results and discriminative analysis. Created using a deductive approach. Reliability analysis also confirmed the proper consistency of the equipment. After going through the validity and reliability process, a total of 30 items will remain as final items on this device. Learn all the details of item analysis, reliability analysis, and validation.

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