Open AccessHemispheric assymetries in the visual processing of spatial frequencies of facial emotional expressions
Author(s) -
Silvija Saunoriūtė-Kerbelienė,
Osvaldas Rukšėnas,
Philip J. Benson
Publication year - 2000
Publication title -
psichologija
Language(s) - English
Resource type - Journals
eISSN - 2345-0061
pISSN - 1392-0359
DOI - 10.15388/psichol.2000.21.9013
Subject(s) - spatial frequency , visual field , facial expression , perception , psychology , visual processing , visual perception , artificial intelligence , right hemisphere , computer vision , computer science , cognitive psychology , audiology , communication , neuroscience , physics , optics , medicine
This paper examines two aspects of the lateralisation of cognitive function. A same-different reaction time paradigms was used to characterize perceptual processing in each visual field. Images were degraded using low-pass filtering to exclude ranges of high frequencies. ln this experiment, psychophysical procedures used facial expression images as a carrier for spatial frequency information. Observers had to judge whether two sequentially presented images showed the same emotion, irrespective of identity gender and spatial frequency content. Reaction time and accuracy measures showed that lower frequency information was processed better in the left visual field (right hemisphere). When higher frequency cues were available, both hemispheres processed stimuli equally well. In addition, some expressions were processed mare rapidly or mare accurately in a particular visual field.