Original article| Volume 52, ISSUE 4, P338-348, August 15, 2002

Schizophrenia and affective disorder show different visual scanning behavior for faces: a trait versus state-based distinction?

  • Carmel M Loughland
    Address reprint requests to Carmel M. Loughland, University of Newcastle, Neuroscience Institute of Schizophrenia and Allied Disorders, Center for Mental Health Studies, Discipline of Psychiatry, Callaghan NSW 2308, Australia
    Brain Dynamics Centre, Westmead Hospital,Sydney, Australia

    Department of Psychology (CML, LMW) University of Sydney, Sydney, Australia

    Centre for Mental Health Studies (CML), Discipline of Psychiatry, University of Newcastle, Callaghan, Australia
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  • Leanne M Williams
    Brain Dynamics Centre, Westmead Hospital,Sydney, Australia

    Department of Psychology (CML, LMW) University of Sydney, Sydney, Australia
    Search for articles by this author
  • Evian Gordon
    Brain Dynamics Centre, Westmead Hospital,Sydney, Australia

    Department of Psychological Medicine (EG), University of Sydney, Sydney, Australia
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      Background: Abnormal visual scanpaths to faces and facial expressions in schizophrenia may underlie schizophrenic subjects’ disturbed interpersonal communication. This study is the first to examine the specificity of these impairments to schizophrenia, by including an affective disorder psychiatric control group.
      Methods: The visual scanpath performance of 65 schizophrenia, 52 affective disordered, and 61 control subjects were compared in two experiments. In the “face recognition” experiment, subjects viewed four identifiable (non-degraded) neutral faces versus four matched non-identifiable (degraded) control faces. In the “facial affect recognition” experiment, subjects viewed positive (happy), negative (sad), and neutral (control) facial emotion stimuli. Concurrent behavioral tasks were face matching (face recognition) and expression matching (facial affect recognition), each under two multiple-choice conditions (7 or 3 options).
      Results: Scanpath disturbances were most apparent in schizophrenia subjects, who maintained a comparatively “restricted” scanpath style to all face stimuli. Schizophrenics subjects also showed the greatest recognition difficulties, particularly for neutral and happy faces. Scanpath parameters for affective disorder subjects differed only from the schizophrenia (but not the control) group, except for attention to facial features where they generally avoided facial features in all expressions and showed the greatest attentional problems of all groups for degraded faces.
      Conclusions: Our results suggest that a global restriction of visual scanpaths is specific to schizophrenic psychosis and might be a trait marker for this disorder, whereas scanpath abnormalities in affective disorder might instead reflect severe state-based (or discrete) attentional disturbances.


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