Figure 2

Eye-tracking analysis for the “study” bird. (A) Five bird ROIs that were manually drawn on each bird image (head, wing, body, tail, and feet). (B) Average percentage of looking time as a function of ROI for experts (left) and novices (right). (C) Temporal unfolding of proportion looking time as a function of time relative to the stimulus onset for experts (left) and novices (right). Within each time window of 100 ms (30 time-windows), the fixation duration in each ROI was divided by the total fixation duration in that window. Obligatory fixation ROI is included here to illustrate that all participants started fixating the same point outside the bird. Error bars represents SEMs.