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Differentiating facial incongruity and flatness in schizophrenia, using structured light camera data.

Talia Tron, Abraham Peled, Alexander Grinsphoon

    Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference
    |March 9, 2017
    PubMed
    Summary

    Schizophrenia patients show incongruent emotional expression, with intact emotional experience. Novel methods reveal less specific facial responses in schizophrenia, differentiating it from affect flattening.

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    Area of Science:

    • Neuroscience
    • Psychiatry
    • Computer Vision

    Background:

    • Incongruity between emotional experience and expression is a key schizophrenia symptom.
    • This symptom is poorly defined and often confused with affect flattening.
    • Objective measurement of facial activity in schizophrenia is lacking.

    Purpose of the Study:

    • To objectively measure facial activity in schizophrenia patients and healthy individuals.
    • To define and compare novel measures of emotional expression congruence and flat affect.
    • To examine the relationship between objective measures and clinical evaluations.

    Main Methods:

    • Utilized structured-light depth camera and dedicated software for automated facial activity measurement.
    • Employed an emotionally evocative task for participants.
    • Developed new metrics for assessing emotional expression congruence and flat affect.

    Main Results:

    • Schizophrenia patients exhibited incongruent emotional expression, characterized by a less specific range of facial responses to similar emotional stimuli.
    • Emotional experience remained intact in schizophrenia patients.
    • When considering affect flatness, no contextually inappropriate facial expressions were observed in schizophrenia patients.

    Conclusions:

    • Novel automated methods can objectively quantify emotional expression incongruity in schizophrenia.
    • Findings differentiate incongruity from affect flattening, highlighting a less specific facial repertoire in schizophrenia.
    • This research provides a foundation for improved clinical evaluation of emotional expression in schizophrenia.