The Development of Instrument Tests to Measure Students’ Adaptive Reasoning Abilities on Number Patterns

Abstract

This study aims to produce test instruments to measure the levels of students' adaptive reasoning abilities in the form of a description by looking at the product and quality of the instruments developed. The type of study was Research and Development based on the formative evaluation model by Tessmer, which consists of 4 stages, namely: (1) preliminary, (2) self-evaluation, (3) prototype, and (4) field test. The subjects total 21 students. The results of the study are; (1) the expert judgments' score about the tests with a coefficient of 0.82, in a very valid category, (2) the reliability score about the tests of  0.939, in a very high interpretation, (3) the level of difficulty obtained the average total score of 0.70 in a moderate interpretation, (4) the distinguishing power is obtained the average total score of 0.31 with a good interpretation, and (5) the criteria for the practicality of the tests are included in the positive category seen from the results of the teacher response analysis obtained a percentage of 85%, and the results of the analysis of student responses obtained a percentage of 84%. Thus, the developed test instrument is feasible to be used to measure students' adaptive reasoning abilities.