Behavioural and MEG studies of perception of low spatial frequency faces

Bhuvanesh Awasthi, Paul F. Sowman, Jason Friedman, Mark A. Williams

    Research output: Contribution to journalMeeting abstract


    A pivotal issue in the field of cognitive neuroscience of face perception has centered on the extraction and processing of relevant information from the visual environment. Previous research has documented distinct spatial frequency (SF) channels that process incoming visual information with selective properties. Low spatial frequency (LSF) is reported to support configural (global) processing while high spatial frequency (HSF) information aids fine-grained, featural (local) processing. While most research addresses individual roles of the SF scales (using just one SF band at a time), issues regarding the integration of these scales have remained unexplored. In order to better understand how faces are processed by the visual system, it is necessary to determine the relative contribution of LSF and HSF scales in the perception of faces. Recently, through a series of categorisation experiments, we demonstrated interference by LSF information while reaching for HSF targets. We also established the LSF supports stronger, faster and lateralised perception of faces. Magnetoencephalography (MEG) was then used to further probe the temporal and neural markers of LSF and HSF information processing the faces. Collated findings from the behavioural and MEG studies will be discussed in the context of the role of LSF in face processing.
    Original languageEnglish
    Pages (from-to)223
    Number of pages1
    JournalClinical EEG and neuroscience
    Issue number3
    Publication statusPublished - 2012
    EventAustralasian Cognitive Neurosciences Conference (21st : 2011) - Sydney
    Duration: 9 Dec 201112 Dec 2011


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