Coactivation occurs within objects, not between dimensions

Mordkoff, J. Toby; Halterman, Rose

doi:10.1167/8.6.986

Cited by 1 publication

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“…Signal integration may also require that redundant features belong to a single object (e.g., Mordkoff & Halterman, VSS 2008) or that attention is distributed over redundant features when they are spatially separated (e.g., by precueing the relevant region; Feintuch & Cohen, 2002). Because features belonging to the same object tend to be attended together (e.g., Duncan, 1984; O'Craven, Downing, & Kanwisher, 2000), these results may suggest that attending to redundant features may enable signal integration.…”

Section: Discussionmentioning

confidence: 99%

A unique role of endogenous visual-spatial attention in rapid processing of multiple targets.

Guzman-Martinez

Grabowecky

Palafox

et al. 2011

Journal of Experimental Psychology: Human Perception and Perfor

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Visual spatial attention can be exogenously captured by a salient stimulus or can be endogenously allocated by voluntary effort. Whether these two attention modes serve distinctive functions is debated, but for processing of single targets the literature suggests superiority of exogenous attention (it is faster acting and serves more functions). We report that endogenous attention uniquely contributes to processing of multiple targets. For speeded visual discrimination, response times are faster for multiple redundant targets than for single targets due to probability summation and/or signal integration. This redundancy gain was unaffected when attention was exogenously diverted from the targets, but was completely eliminated when attention was endogenously diverted. This was not due to weaker manipulation of exogenous attention because our exogenous and endogenous cues similarly affected overall response times. Thus, whereas exogenous attention is superior for processing single targets, endogenous attention plays a unique role in allocating resources crucial for rapid concurrent processing of multiple targets.

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