Angles, circles, and quitting rules in visual foraging
Mon—HZ_2—Talks2—902
Presented by: Marcos Bella-Fernández
Foraging is a variant of the classical visual search paradigm where the observer collects targets in a display rich in both targets and distractors. Visuospatial organization is a characteristic of foraging behavior which is receiving increasing attention in foraging research. On one side, organization may help to predict the decision of leaving a certain search. Consolidated evidence shows that observers tend to leave roughly after the instantaneous target intake rate drops below the average intake rate. However, this alone does not necessarily mean that the intake rates are predictors of quitting behavior, and recent evidence suggests that visuospatial search organization may serve as a better predictor of the leaving decision. Moreover, studying angles and trajectories may be useful to further study search organization. In this talk I present new methods to study visual scanning and search organization through the trajectory angles and circular data analysis.
Keywords: Visual Foraging, Quitting Decision, ROC Curves, Angles, Circular statistics