Abstract
The decrease in reaction time when target location in successive trials in visual search is an established effect. Using transcranial magnetic stimulation (TMS) we have previously shown that repetition of target location in a colour/orientation conjunction visual search task is also commensurate with a decrease in involvement of right posterior parietal cortex (rPPC) an area known to be involved in the processing of this task. The decrease in reaction time seems to be mediated by a concomitant lack of engagement of rPPC.
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