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Author (up) Awasthi, B.; Sowman, P.F.; Friedman, J.; Williams, M.A. pdf  url
doi  openurl
  Title Distinct spatial scale sensitivities for early categorisation of Faces and Places: Neuromagnetic and Behavioural Findings Type Journal Article
  Year 2013 Publication Frontiers in Human Neuroscience Abbreviated Journal  
  Volume 7 Issue 91 Pages  
  Keywords  
  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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  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1662-5161 ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number Serial 67  
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Author (up) Awasthi, B.; Williams, M.A.; Friedman, J. pdf  url
doi  openurl
  Title Examining the role of red background in magnocellular contribution to face perception Type Journal Article
  Year 2016 Publication PeerJ Abbreviated Journal PeerJ  
  Volume 4 Issue Pages e1617  
  Keywords  
  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.  
  Address  
  Corporate Author Thesis  
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  Language en Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 2167-8359 ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number Serial 81  
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