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Author  |
Awasthi, B.; Williams, M.A.; Friedman, J. |
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Title |
Examining the role of red background in magnocellular contribution to face perception |
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Journal Article |
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Year |
2016 |
Publication |
PeerJ |
Abbreviated Journal |
PeerJ |
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Volume |
4 |
Issue |
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Pages |
e1617 |
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Abstract |
This study examines the role of the magnocellular system in the early stages of face perception, in particular sex categorization. Utilizing the specific property of magnocellular suppression in red light, we investigated visually guided reaching to low and high spatial frequency hybrid faces against red and grey backgrounds. The arm movement curvature measure shows that reduced response of the magnocellular pathway interferes with the low spatial frequency component of face perception. This finding provides behavioral evidence for magnocellular contribution to non-emotional aspect of face perception. |
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Language |
en |
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2167-8359 |
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81 |
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Author |
Awasthi, B.; Sowman, P.F.; Friedman, J.; Williams, M.A. |
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Title |
Distinct spatial scale sensitivities for early categorisation of Faces and Places: Neuromagnetic and Behavioural Findings |
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Journal Article |
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Year |
2013 |
Publication |
Frontiers in Human Neuroscience |
Abbreviated Journal |
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Volume |
7 |
Issue |
91 |
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Abstract |
Research exploring the role of spatial frequencies in rapid stimulus detection and categorisation report flexible reliance on specific spatial frequency bands. Here, through a set of behavioural and magnetoencephalography (MEG) experiments, we investigated the role of low spatial frequency (LSF)(25 cpf) information during the categorisation of faces and places. Reaction time measures revealed significantly faster categorisation of faces driven by LSF information, while rapid categorisation of places was facilitated by HSF information. The MEG study showed significantly earlier latency of the M170 component for LSF faces compared to HSF faces. Moreover, the M170 amplitude was larger for LSF faces than for LSF places, whereas the reverse pattern was evident for HSF faces and places. These results suggest that spatial frequency modulates the processing of category specific information for faces and places. |
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1662-5161 |
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67 |
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