MOT performance as a function of set size in Experiment 3.

<p>Panel A shows accuracy in terms of the mean number of identified targets. Performance drops with increasing number of distractors, but less steeply under dual-task (open symbols) than single-task (closed symbols) conditions. Panel B shows reaction time to identify the targets in the final display. Across all levels of set size, dual-task responses are consistently faster than single-task responses. Error bars denote the standard error of the mean.