Goal: Objects appearing in the visual periphery can automatically capture attention. Last year (White, Lunau & Carrasco, 2012) we compared the exogenous cueing effects of a single disk and a color singleton (e.g., a red disk among green ones). We found lower contrast thresholds and response times for stimuli adjacent to the single cue's location than at the other side of the screen. In contrast, the singleton did not affect performance. Here we investigated whether this dissociation arose because single cues and color singletons differ in the spatial profile of attention that they evoke. We tested a range of cue-target distances, including the exact location of the cue (rather than just adjacent to it).
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