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Expectancy effects on spatial frequency processing

Sowden, PT, Ozgen, E, Schyns, PG and Daoutis, C (2003) Expectancy effects on spatial frequency processing Vision Research, 43 (26). pp. 2759-2772.

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We explored top-down modulation of spatial frequency (SF) processing. When auditory pre-cueing directed observers' attention to one of two 4-octaves (SF) apart plaid components observers tended to perceive the cued component, suggesting selective attention to the SF channel they expected to carry task relevant information. In agreement, pre-cueing had no effect with components often processed by the same channel (0.5-octaves apart). Further, effects of expectancy were greater than of uncertainty and were SF tuned. Combined our findings suggest top-down modulation of early, cortical, SF processing. We argue this could similarly explain the previously reported influences of categorisation on SF processing

Item Type: Article
Divisions : Surrey research (other units)
Authors :
Ozgen, E
Schyns, PG
Date : 1 December 2003
DOI : 10.1016/S0042-6989(03)00480-2
Depositing User : Symplectic Elements
Date Deposited : 17 May 2017 09:24
Last Modified : 24 Jan 2020 16:51

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