Abstract
This study examined hemispatial bias in a free-viewing condition of the judgement of facial expressions of emotions. Right-handed male subjects were asked to judge the intensity, in terms of expressiveness, of facial emotion in normal and mirror-reversed orientations. Expressions in mirror-reversed orientation were perceived as more intense than in normal orientation.
Highlights
Neuropsychological research has shown that the left side of the face is more pronounced during expressions of emotions in general (Sackeim et ai., 1978; Borod, 1990; Asthana and MandaI, 1996)
A laterality ratio, calculated as preference for LR minus preference for RL divided by the total number of preferences (Bryden, 1982), was calculated for each subjects judgement
The main effect of emotion could not be tested in the factorial ANOVA of Emotion x Facial orientation because the total number of preferences was identical for both the emotions
Summary
Neuropsychological research has shown that the left side of the face is more pronounced (as a function of the right hemisphere) during expressions of emotions in general (Sackeim et ai., 1978; Borod, 1990; Asthana and MandaI, 1996) Researchers in this field have indicated that the perceiver's left hemiface falling on the side of expressor's hemiface (i.e. right) determines judgement about the structural functional resemblance with a whole face (Gilbert and Bakan, 1973; Moreno et ai., 1990; see Christian and Hackworth, 1993). This is because the right hemisphere with its contralateral fibre projections to the left-visual-field largely mediates face processing (Borod et ai., 1990). To avoid the scanning bias accrued out of reading habit (left to right), the photographs were presented in upper and lower regions of the central - visual field
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