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The shared signal hypothesis and neural responses to expressions and gaze in infants and adults

Rigato, Silvia and Farroni, Teresa and Johnson, Mark H. (2010) The shared signal hypothesis and neural responses to expressions and gaze in infants and adults. Social cognitive and affective neuroscience 5 (1), pp. 88-97. ISSN 1749-5024.

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Official URL: http://dx.doi.org/10.1093/scan/nsp037

Abstract

Event-related potentials were recorded from adults and 4-month-old infants while they watched pictures of faces that varied in emotional expression (happy and fearful) and in gaze direction (direct or averted). Results indicate that emotional expression is temporally independent of gaze direction processing at early stages of processing, and only become integrated at later latencies. Facial expressions affected the face-sensitive ERP components in both adults (N170) and infants (N290 and P400), while gaze direction and the interaction between facial expression and gaze affected the posterior channels in adults and the frontocentral channels in infants. Specifically, in adults, this interaction reflected a greater responsiveness to fearful expressions with averted gaze (avoidance-oriented emotion), and to happy faces with direct gaze (approach-oriented emotions). In infants, a larger activation to a happy expression at the frontocentral negative component (Nc) was found, and planned comparisons showed that it was due to the direct gaze condition. Taken together, these results support the shared signal hypothesis in adults, but only to a lesser extent in infants, suggesting that experience could play an important role.

Item Type: Article
Keyword(s) / Subject(s): ERP, facial expressions, gaze, shared signal hypothesis
School or Research Centre: Birkbeck Schools and Research Centres > School of Science > Psychological Sciences
Depositing User: Administrator
Date Deposited: 22 Dec 2010 14:50
Last Modified: 17 Apr 2013 12:19
URI: http://eprints.bbk.ac.uk/id/eprint/2448

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