Fig. 3.

Results Experiment 1—the effects of dual-task performance on search times. RTs for inefficient search performed in isolation have been subtracted from search RTs during the dual-task conditions, for target present (filled triangle) and target absent search (filled square). On average, an additional 11 ms per item was required to perform target present search concurrently with the SWM task and 26 ms per item for target absent search, compared to search performed in isolation. Similarly an extra 11 ms per item was required for target present search performed concurrently with the VWM task and 28 ms per item for target absent search. Error bars indicate standard error of the mean