Relevant Letter Choices on Conflict Tests  as a function of Presentation Time for Individual Birds

Two birds (#1H & # 3N, the left two panels) consistently identified the local letter of the conflict stimuli more often across all stimulus durations, although this was reduced at the shortest durations. In contrast, the other two birds (#2R & #4B, the right two panels) showed systematic changes in the proportion of global and local choices as a function of stimulus duration. At the short durations, these birds reported the local letter most often, while at the longer durations the global letter was reported significantly more often. Thus, for two birds the local advantage was present across all durations, while the two other birds shifted to showing a global advantage at the longest duration (Cavoto & Cook, 2001).