What's Happening in Consecutive Decisions: An Eye Tracking-Based Behavioral Study

Background and Aim: In real life achieving a goal is often be achieved if a series of decisions were correct. The aim of this study was to determine termination criterion on the second decision in proportion of how the first decision was made in two consecutive perceptual decisions. Previous studies have shown this decisions were optimum but what happened when participants reported their confidence at the same time with their answer? Did this report affect optimal performance? Methods: Participants were ۱۲ students who were selected by convenience sampling. Participants had to make two stage perceptual decisions and report their confidence at the same time with eye saccades. If only both decisions were correct they receive positive feedback. Before receiving feedback they must report their confidence about the correctness of both decisions. In each stage the perceptual decision was Random Dots Motion task. An eye tracker device was use to record and control eye movements. Participants went through five training phase to enter the main experiment. This study designed and analyzed by MATLAB. Results: The aim of this study was to expand our understanding of the consecutive perceptual decisions when the confidence is reported in every step. Conclusion Results showed when participants were more confident in their first decision, they took more time and were more accurate on their second decision. This strategy is optimal if response time matter. The training phase consisted of previous studies and their results were replicated even by analyzing training phase data. Main experiment results showed reported confidence had the same impact on consecutive decisions like estimated confidence. Conclusion: The participants' behavior in this experiment were optimum and confidence determine the decision strategy.

کلیدواژه ها:

Perceptual Decisions ، Consecutive Decisions ، Confidence ، Eye Tracker