Dimensional Information-Theoretic Measurement of Facial Emotion Expressions in Schizophrenia
Joint Authors
Hamm, Jihun
Pinkham, Amy
Gur, Ruben C.
Verma, Ragini
Kohler, Christian G.
Source
Schizophrenia Research and Treatment
Issue
Vol. 2014, Issue 2014 (31 Dec. 2014), pp.1-10, 10 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2014-02-25
Country of Publication
Egypt
No. of Pages
10
Main Subjects
Abstract EN
Altered facial expressions of emotions are characteristic impairments in schizophrenia.
Ratings of affect have traditionally been limited to clinical rating scales and facial muscle movement analysis, which require extensive training and have limitations based on methodology and ecological validity.
To improve reliable assessment of dynamic facial expression changes, we have developed automated measurements of facial emotion expressions based on information-theoretic measures of expressivity of ambiguity and distinctiveness of facial expressions.
These measures were examined in matched groups of persons with schizophrenia (n=28) and healthy controls (n=26) who underwent video acquisition to assess expressivity of basic emotions (happiness, sadness, anger, fear, and disgust) in evoked conditions.
Persons with schizophrenia scored higher on ambiguity, the measure of conditional entropy within the expression of a single emotion, and they scored lower on distinctiveness, the measure of mutual information across expressions of different emotions.
The automated measures compared favorably with observer-based ratings.
This method can be applied for delineating dynamic emotional expressivity in healthy and clinical populations.
American Psychological Association (APA)
Hamm, Jihun& Pinkham, Amy& Gur, Ruben C.& Verma, Ragini& Kohler, Christian G.. 2014. Dimensional Information-Theoretic Measurement of Facial Emotion Expressions in Schizophrenia. Schizophrenia Research and Treatment،Vol. 2014, no. 2014, pp.1-10.
https://search.emarefa.net/detail/BIM-1047467
Modern Language Association (MLA)
Hamm, Jihun…[et al.]. Dimensional Information-Theoretic Measurement of Facial Emotion Expressions in Schizophrenia. Schizophrenia Research and Treatment No. 2014 (2014), pp.1-10.
https://search.emarefa.net/detail/BIM-1047467
American Medical Association (AMA)
Hamm, Jihun& Pinkham, Amy& Gur, Ruben C.& Verma, Ragini& Kohler, Christian G.. Dimensional Information-Theoretic Measurement of Facial Emotion Expressions in Schizophrenia. Schizophrenia Research and Treatment. 2014. Vol. 2014, no. 2014, pp.1-10.
https://search.emarefa.net/detail/BIM-1047467
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1047467