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One face or two? Contrasting different versions of the chimeric faces test
Victoria J Bourne1, Dawn L Gray
1Department of Psychology, Royal Holloway, University of London, Egham Hill, Egham, Surrey, TW20 OEX, UK. victoria.bourne@rhul.ac.uk
Laterality
|January 25, 2011
Summary
The chimeric faces test, used for behavioral lateralization, showed a left visual field bias in both one- and two-face versions. This bias indicates right hemisphere superiority in processing positive facial emotions.
Area of Science:
- Neuroscience
- Cognitive Psychology
- Behavioral Science
Background:
- The chimeric faces test is a common method for studying behavioral lateralization.
- Existing methodologies for this test exhibit considerable variation.
- Understanding hemispheric specialization in face processing is crucial.
Purpose of the Study:
- To compare the one- and two-face versions of the chimeric faces test.
- To determine if the laterality biases observed in both versions are correlated.
- To investigate hemispheric lateralization in processing facial emotions.
Main Methods:
- Utilized one- and two-face versions of the chimeric faces test.
- Employed neutral and happy chimeric faces stimuli.
- Compared laterality biases between the two test versions.
Main Results:
- Both one- and two-face versions demonstrated a significant left visual field bias.
- This left visual field bias suggests a right hemisphere superiority for processing positive facial emotions.
- A significant correlation was found between the laterality biases of the two versions.
Conclusions:
- Both the one- and two-face chimeric faces tests effectively reveal right hemisphere dominance in processing positive facial emotions.
- The laterality biases identified in both versions are correlated, validating their shared underlying mechanism.
- The two-face version exhibited higher reliability for assessing laterality biases compared to the one-face version.
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