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Effects of distractors on target identification and feature integration theory Department of Psychology, University of Warwick Abstract The effect of distractors on target identification was studied using 118 participants, from Warwick University. The experiment was based on work done by Treisman and Gelade (1980), who developed the feature integration theory. Each participant completed a visual search computer program consisting of three conditions. As well as these conditions as a factor there was also the varying display sizes such as 4, 8 and 16, and with the target being either present or absent in the trials. The mean response time and percentage errors were recorded. As predicted the display size had little effect on reaction time. The response rate was faster in the conjunction search condition when targets were present as not all of the distractors would have to be searched. In the single feature colour search the absence/presence of the target had no...

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