Studying the influence of psychological factors with orientation perceptual errors on Decision making process of individual investors

Perceptual errors is an important factor for investors in financial decisions that affect their decisions when dealing on the stock. The aim of this study is to identify errors common perception among investors and its impact on their investment decisions. For this purpose, 300 person were randomly selected for samplefrom investors Tehran Stock Exchange. The data was collected using a questionnaire. Truth hypotheses were tested using factor analysis. The findings indicate that cognitive errors influence on investment decisions. The results showed that Representativeness error 19 percent, error overconfidence 31 percent and 29 percent state error morale impact on investment decisions.