Fig. 2

Representation of stimuli. The pre-cue stimulus flashed on for 67 ms and then off for 83 ms. Targets were on the same side as the single cue 50 % of the time. The target remained on display until a response was made but for no longer than 1000 ms. Dual cues were identical except that two cues appeared simultaneously in the same locations in which the single cues appeared