Expectancy effects on spatial frequency processing.

Sowden, Paul T; Ozgen, Emre; Schyns, Philippe G; Daoutis, Christine

Sowden, Paul T; Ozgen, Emre; Schyns, Philippe G; Daoutis, Christine.

Afiliación

Sowden PT; Department of Psychology, University of Surrey, Guildford, Surrey GU2 7XH, UK. p.sowden@surrey.ac.uk

Vision Res ; 43(26): 2759-72, 2003 Dec.

Article en En | MEDLINE | ID: mdl-14568093

RESUMEN

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.

Asunto(s)

Sensibilidad de Contraste/fisiología; Señales (Psicología); Percepción Visual/fisiología; Umbral Diferencial/fisiología; Aprendizaje Discriminativo/fisiología; Humanos; Orientación/fisiología; Reconocimiento Visual de Modelos/fisiología; Enmascaramiento Perceptual/fisiología

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Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Percepción Visual / Sensibilidad de Contraste / Señales (Psicología) Tipo de estudio: Prognostic_studies Límite: Humans Idioma: En Revista: Vision Res Año: 2003 Tipo del documento: Article Pais de publicación: Reino Unido

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