Development of Item Specifications for Scientific Competency in Physics for Mathayomsuksa 5 Students

Abstract

The purposes of this research were 1) to develop and verify the qualification of the item specifications for scientific competency in physics, and 2) to develop and verify the quality of the item scientific competency in physics subject. The sample consisted of 362 students in The Secondary Educational Service Area Office 1 by multi stage sampling. The instruments used were the evaluation form to evaluate the item specifications for scientific competency in physic, the assessment form, physics and the test for scientific competency. The research findings were as follows: 1) Item specifications include main behavior, sub behavior, learning unit, learning indicators, the purpose, test form, the question style, the correct answer, and the sample test.The quality of the item specifications in terms of accuracy, suitability and probability was in the high level. 2) The quality of item scientific competencies 35 item was shown by content validity with IOC indices ranged from 0.60 to 1.00, indices of difficulty ranged from 0.20 to 0.72, discrimination power ranged from 0.32 to 0.91 reliability scale was 0.940 and construct validity  by considering from the exam scores between groups was the group with high scientific competencies had higher average scores than those with low scientific competencies was which statistically significant difference at .05 levels.