The application of fuzzy systems to psychological and educational measurements

One of the main aims of using the academic achievement tests is to assess the learner''s academic achievement. Like other psychological tests¡ achievement tests as well as different grading scale behavior are useful tools when they provide an unbiased estimate of the target variable measurement. However¡ due to the nature of the variables as well as measurement feature tools¡ there is a chance to presence some errors in the measurement process. Fuzzy logic-based systems with the benefit of modern methods of mathematical calculations are trying to reduce the ambiguity of the variable measurement process. In this study¡ the mid-term and the final scores of the 22 undergraduate students in the descriptive statistics course was considered as an uncertain and ambiguous data. Using fuzzy logic as an effective tool data was analyzed and the results of the using the proposed fuzzy model compared to the traditional methods (conventional) were discussed.