摘要:AbstractA cognitive diagnostic test is an instrument for teachers to implement in measuring and evaluating during instruction in order to diagnose mastery learning for each attribute set for the cognitive model of individual students. The results of the diagnosis can be presented with a high degree of validity, convenience and speed. Hence, the present study was aimed at forming the cognitive diagnostic test on basic arithmetic operations, beginning by setting the desired attributes for measurement in the cognitive model, namely, the following four topics: addition, subtraction, multiplication and division of counted amounts and forming questions according to the set cognitive model. Next, the mental dimension is content validity by relying upon the discretion of experts.