A CONSTRUCTION DIAGNOSTIC TEST ON HOMEOSTASIS FOR MATHAYOMSUKSA 4 STUDENTS UNDER UDON THANI SECONDARY EDUCATION SERVICE AREA OFFICE.

Abstract

The purpose of this research were to 1) develop a diagnostic test to identify learning deficiencies in biological science on the topic of homeostasis in the human body; 2) evaluate the quality of the diagnostic test for identifying learning deficiencies; and 3) create a user manual for administering the diagnostic test. The sample consisted of 678 Grade 10 students under the jurisdiction of the Secondary Educational Service Area Office, Udon Thani, selected through multi-stage sampling. The research instruments included: 1) a test for surveying learning deficiencies, 2) the diagnostic test for identifying learning deficiencies, and 3) the diagnostic test user manual. Data were analyzed using statistical methods including percentage, mean, content validity index, discrimination index, difficulty index, and reliability.

         The research findings were as follows:

1. The development of a diagnostic test to identify learning deficiencies in biological science on the topic of homeostasis in the human body consisted of 40 items. The quality of the diagnostic test showed content validity (IOC) ranging from 0.60 to 1.00, item discrimination index (B) ranging from 0.22 to 0.56, difficulty index (p) ranging from 0.47 to 0.75, and a reliability coefficient (r_cc) of 0.85.
2. The analysis of the causes of learning deficiencies revealed five main issues across six learning objectives: 1) inability to distinguish content (32.04%), 2) lack of content understanding (25.11%), 3) inability to recall content (21.55%), 4) inability to analyze content (11.72%), and 5) inability to interpret meaning (9.58%).

          3. The development of the user manual for the diagnostic test included the objectives, structure of the test, test quality, time required for administration, scoring procedures, and diagnostic interpretation. All items in the manual passed the evaluation for appropriateness