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Extraction of social information from gait in schizophrenia

Published online by Cambridge University Press:  28 June 2013

J. S. Peterman
Affiliation:
Department of Psychology, Vanderbilt University, Nashville, TN, USA
A. Christensen
Affiliation:
Section of Computational Sensomotorics, Department of Cognitive Neurology, Hertie-Institute for Clinical Brain Research, Centre for Integrative Neuroscience, University Clinic Tuebingen, Tuebingen, Germany
M. A. Giese
Affiliation:
Section of Computational Sensomotorics, Department of Cognitive Neurology, Hertie-Institute for Clinical Brain Research, Centre for Integrative Neuroscience, University Clinic Tuebingen, Tuebingen, Germany
S. Park*
Affiliation:
Department of Psychology, Vanderbilt University, Nashville, TN, USA Department of Psychiatry, Vanderbilt University, Nashville, TN, USA
*
*Address for correspondence: S. Park, Ph.D., Vanderbilt University, Department of Psychology, 111 21st Ave. South, 301 Wilson Hall, Nashville, TN 37240, USA. (Email: [email protected])

Abstract

Background

The human face and body are rich sources of socio-emotional cues. Accurate recognition of these cues is central to adaptive social functioning. Past studies indicate that individuals with schizophrenia (SZ) show deficits in the perception of emotion from facial cues but the contribution of bodily cues to social perception in schizophrenia is undetermined. The present study examined the detection of social cues from human gait patterns presented by computer-generated volumetric walking figures.

Method

A total of 22 SZ and 20 age-matched healthy control participants (CO) viewed 1 s movies of a ‘digital’ walker's gait and subsequently made a forced-choice decision on the emotional state (angry or happy) or the gender of the walker presented at three intensity levels. Overall sensitivity to the social cues and bias were computed. For SZ, symptom severity was assessed.

Results

SZ were less sensitive than CO on both emotion and gender discrimination, regardless of intensity. While impaired overall, greater signal intensity did improve performance of SZ. Neither group differed in their response bias in either condition. The discrimination sensitivity of SZ was unrelated to their social functioning or symptoms but a bias toward perceiving gait as happy was associated with better social functioning.

Conclusions

These results suggest that SZ are impaired in extracting social information from gait but SZ benefited from increased signal intensity of social cues. Inaccurate perception of social cues in others may hinder adequate preparation for social interactions.

Type
Original Articles
Copyright
Copyright © Cambridge University Press 2013 

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