No spatial frequency hemispheric specialization in face recognition at final stages of visual processing R de Moraes Júnior, S Fukusima |
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Department of Psychology, University of São Paulo, Brazil
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| Spatial frequency (SF) hemispheric specialization for recognizing faces was investigated psychophysically at the final stages of visual processing. Men and women were asked to rate their recognition confidence to new and old face pictures, previously submitted to low-pass and high-pass SF bands filters, after 300 ms exposures in the left and the right visual field. It was used one adaptation of the divided visual field technique. The corrected recognition taxes and the Az parameters (area under zROC curve) indicated no significant hemispheric specialization for low and high SF in the overall sample. Taking into account literature, this absence of SF hemispheric specialization may be explained: (a) by that the sensitivity to different SF bands is retinotopically mapped in the visual cortex; (b) by that the lateralized presentation reduces asymmetry effects; and (c) by that the SF hemispheric specialization only is noticed at early stages of the processing visual. |
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