Perceptual objects and the cost of filtering |
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Authors: | A. Treisman D. Kahneman J. Burkell |
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Affiliation: | 1. Department of Psychology, University of British Columbia, #154—Main Mall, V6T 1Y7, Vancouver, British Columbia, Canada
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Abstract: | The latency of reading a single word is increased by 20 to 40 msec if another object is present in the display. The delay is affected by the spatial organization of the display: a colored frame causes less delay when it surrounds the word than when it is shown on the opposite side of fixation. A small gap in the frame is also more efficiently detected as a secondary task when the frame is around the word than when the two are spatially separate. The advantage of integrated over separate presentation suggests that a “filtering cost” is incurred when two distinct perceptual objects compete for attention. Attention in filtering tasks operates on perceptually distinct objects rather than on nodes in a semantic network. |
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