Comparing Reinforcement Values of Facial Expressions: An Eye-Tracking Study
Reinforcement values of facial expressions for visual fixation remain underdeveloped in extant literature, though numerous studies have investigated the function of facial expressions as antecedents of gaze behavior. This study used a concurrent gaze-contingent reinforcement procedure to compare reinforcement values of positive and negative facial expressions for gaze fixation. In total, 7 of the 20 typical adults fixated more frequently on the side that was followed by positive facial expressions. The results suggest that a novel application of eye tracking technology could allow for the evaluation and comparison of reinforcement values of social visual stimuli.
KeywordsGaze fixation Social reinforcers Facial expressions Eye tracking Smile
This study was funded by Grant-in-Aid for Scientific Research on Innovative Areas No. 18H04182 “Construction of the Face-Body Studies in Transcultural Conditions” to S. M., and the CREST research project on Social Imaging (JPMJCR14E2), Japan Science and Technology Agency to J. Y.
Compliance with Ethical Standards
Conflict of Interest
All authors declare that they have no conflict of interest.
All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.
Informed consent was obtained from all individual participants included in the study.
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