The Contribution of Covert Attention to the Set-Size and Eccentricity Effects in Visual Search

摘要: To reexamine the role of covert attention in visual search, authors directly manipulated by peripherally cueing target location and analyzed its effects on set-size eccentricity effects. Observers participated feature conjunction tasks. Experiment 1 used precues, 2 postcues a yes-no task under valid-, invalid-, neutral-cueing conditions. Experiments 3 4 2-interval alternative forced-choice visual-search cued neutral Precueing improved performance searches; postcueing did not. For targets, effect for features conjunctions was diminished, suggesting that attentional mechanism improves quality sensory representation attended location. The reduced but not eliminated. This questions serial-search models attribute major to search.