A Scanpath Analysis of the Risky Decision Making Process
In the field of eye tracking, scanpath analysis can reflect the sequential and temporal properties of the cognitive process. However, the advantages of scanpath analysis have not yet been utilized in the study of risky decision making. We explored the methodological applicability of scanpath analysis to test models of risky decision making by analyzing published data from the eye tracking studies of Su et al. (2013) Wang and Li (2012) and Sun, Rao, Zhou, and Li (2014) These studies used a proportion task, an outcome matched presentation condition, and a multiple play condition as the baseline for comparison with information search and processing in the risky decision making condition. We found that (i) the similarity scores of the intra conditions were significantly higher than those of the inter condition; (ii) the scanpaths of the two conditions were separable; and (iii) based on an inspection of typical trials, the patterns of the scanpaths differed between the two conditions. These findings suggest that scanpath analysis is reliable and valid for examining the process of risky decision making. In line with the findings of the three original studies, our results indicate that risky decision making is unlikely to be based on a weighting and summing process, as hypothesized by the family of expectation models. The findings highlight a new methodological direction for research on decision making. Copyright (c) 2016 John Wiley Sons, Ltd.