Self-face perception in 12-month-old infants: A study using the morphing technique |
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| Affiliation: | 1. Graduate School of Human-Environment Studies, Kyushu University, Fukuoka, Japan;2. Japan Society for the Promotion of Science, Tokyo, Japan;3. Faculty of Human-Environment Studies, Kyushu University, Fukuoka, Japan;1. University of Texas, Rio Grande Valley, United States;2. University of Nevada, Reno, United States;1. Faculty of Humanities, Logopedics, Child Language Research Center, University of Oulu, Oulu, Finland;2. Sanapolku Oy, Therapy Center, Kouvola, Finland;3. Attentio Oy, Therapy Center, Oulu, Finland;4. Unit of Child Psychiatry, Health Care Services for Families with Children, Family Services, Kainuu Social and Health Care Joint Authority, Kajaani, Finland;5. PEDEGO Research Unit, Clinic of Child Psychiatry, University of Oulu, Oulu, Finland;6. Department of Psychology, University of Massachusetts, Boston, USA;1. Psychology Department, Pace University, New York, NY 10004, United States;2. Pennsylvania State University, Brandywine, Department of Human Development and Family Studies, 25 Yearsley Mill Road, Media, PA 19063, United States;1. Department of Otolaryngology–Head & Neck Surgery, The Ohio State University, United States;2. Department of Speech, Language, and Hearing Sciences, Purdue University, United States;3. Laboratoire de Sciences Cognitives et Psycholinguistique, CNRS, IEC-ENS, EHESS, France |
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| Abstract: | The present study investigated self-face perception in 12-month-old infants using the morphing technique. Twenty-four 12-month-old infants participated in both the main and control experiments. In the main experiment, we used the participant’s own face, an unfamiliar infant’s face (age- and gender-matched), and a morphed face comprising 50 % each of the self and unfamiliar faces as stimuli. The control experiment followed the same procedure, except that the self-face was replaced with another unfamiliar face. In both experiments, two of these stimuli were presented side by side on a monitor in each trial, and infants’ fixation duration was measured. Results showed that shorter fixation durations were found for the morphed face compared with the self-face and the unfamiliar face in the main experiment, but there were no significant preferences for any comparisons in the control experiment. The results suggest that 12-month-old infants could detect subtle differences in facial features between the self-face and the other faces, and infants might show less preference for the self-resembling morphed face due to increased processing costs, which can be interpreted using the uncanny valley hypothesis. Overall, representations of the self-face seem to a certain extent to be formed by the end of the first year of life through daily visual experience. |
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| Keywords: | Facial representation Infancy Self Uncanny valley Visual experience |
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