The purpose of the paper is to compare four models by using fuzzy parameters. The four parametric models considered included: Fuzzy Set Model, QuickEst Heuristics Model, Linear Regression Model, Neural Network Model. Each of these had been proposed as a cognitive model of human judgment and was applied in this study to the estimation of product selection reasonableness. This study focused on the relationship between quality, price, brand, and service without considering how one would evaluate these components. Empirical results show that the Fuzzy model outperformed all the other models.