Longer latency cueing effects.

<p>a) results from Experiment 1. From about 200 to 400 ms after cue-onset, the ERPs elicited by shift inducing cues were positively shifted, relative to the ERPs elicited by non-informative cues. At longer latencies, a clear distinction between cues predicting and easy target and cues predicting a difficult target can be seen; whereas for cues predicting an easy target the ERP wave form was more positive for shift inducing cues, whereas this was not the case for cues predicting a difficult target. This effect can in particular be observed over the contralateral hemisphere. b) results from experiment 2. Two effects can be noted here. First, an early latency cueing effect was present for cues predicting an easy target. At longer latencies, the ERPs elicited by stay-central cues are positively displaced, starting at around 500 ms after cue onset, whereas no such positive displacement can be observed for shift-inducing cues. Notably, this effect was larger for cues predicting an easy target than for cues predicting a difficult target.