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Coronel JC, Federmeier KD. Task demands modulate decision and eye movement responses in the chimeric face test: examining the right hemisphere processing account. Front Psychol. 2014;5:229doi: 10.3389/fpsyg.2014.00229.
Coronel, J. C., & Federmeier, K. D. (2014). Task demands modulate decision and eye movement responses in the chimeric face test: examining the right hemisphere processing account. Frontiers in psychology, 5229. https://doi.org/10.3389/fpsyg.2014.00229
Coronel, Jason C, and Federmeier, Kara D. "Task demands modulate decision and eye movement responses in the chimeric face test: examining the right hemisphere processing account." Frontiers in psychology vol. 5 (2014): 229. doi: https://doi.org/10.3389/fpsyg.2014.00229
Coronel JC, Federmeier KD. Task demands modulate decision and eye movement responses in the chimeric face test: examining the right hemisphere processing account. Front Psychol. 2014 Mar 20;5:229. doi: 10.3389/fpsyg.2014.00229. eCollection 2014. PMID: 24688475; PMCID: PMC3960575.
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Front Psychol. 2014 Mar 20;5:229. doi: 10.3389/fpsyg.2014.00229. eCollection 2014.

Task demands modulate decision and eye movement responses in the chimeric face test: examining the right hemisphere processing account.

Frontiers in psychology

Jason C Coronel, Kara D Federmeier

Affiliations

  1. Annenberg School for Communication, University of Pennsylvania Philadelphia, PA, USA.
  2. Department of Psychology, Program in Neurosciences, and Beckman Institute for Advanced Science and Technology, University of Illinois Champaign, IL, USA.

PMID: 24688475 PMCID: PMC3960575 DOI: 10.3389/fpsyg.2014.00229

Abstract

A large and growing body of work, conducted in both brain-intact and brain-damaged populations, has used the free viewing chimeric face test as a measure of hemispheric dominance for the extraction of emotional information from faces. These studies generally show that normal right-handed individuals tend to perceive chimeric faces as more emotional if the emotional expression is presented on the half of the face to the viewer's left ("left hemiface"). However, the mechanisms underlying this lateralized bias remain unclear. Here, we examine the extent to which this bias is driven by right hemisphere processing advantages vs. default scanning biases in a unique way-by changing task demands. In particular, we compare the original task with one in which right-hemisphere-biased processing cannot provide a decision advantage. Our behavioral and eye movement data are inconsistent with the predictions of a default scanning bias account and support the idea that the left hemiface bias found in the chimeric face test is largely due to strategic use of right hemisphere processing mechanisms.

Keywords: chimeric face test; eye movements; lateralization of emotion; right hemisphere processing account; scanning bias

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