J Korean Neuropsychiatr Assoc.  2016 May;55(2):122-130. 10.4306/jknpa.2016.55.2.122.

Validation of a Video Based Scale for Measuring Social Cognition in Schizophrenia

• Lee J
• Kim H
• Chon MW
• Ahn JH
• Joo YH
• Kim CY

• KMID: 2165002
• DOI: http://doi.org/10.4306/jknpa.2016.55.2.122

Abstract

OBJECTIVES
Social cognition plays an important role in psychiatric symptoms and prognosis in patients with schizophrenia. Diagnostic scales are predominantly text-based or intended for the evaluation of theoretical concepts, with limited usefulness in clinical settings. We therefore developed a video based social cognition scale.
METHODS
Our scale consists of 20 video clips portraying frequently experienced social interactions in real life. Patients were asked which interactions were socially unnatural and the reasons for lies told by actors. Our scale was validated and social cognition and its relationship with symptoms was evaluated using item response theory.
RESULTS
A total of 209 participants (schizophrenia, 101 ; bipolar disorder, 49 ; healthy controls 59) were enrolled. Our scale showed high reliability and concurrent validity compared with the order subtest of the short form of the Weschler Adult Intelligence scale. Internal validity also was high (Cronbach's alpha=0.904). Most items were easy to answer and highly discriminative. The test information curve showed our scale to be more informative in patients with low social cognition ability.
CONCLUSION
Our scale may aid in the study of pathology and social cognition deficits in patients with schizophrenia.

Keyword

Theory of mind; Schizophrenia; Bipolar disorder; Reliability; Validity

MeSH Terms

Adult
Bipolar Disorder
Cognition*
Humans
Intelligence
Interpersonal Relations
Pathology
Prognosis
Schizophrenia*
Theory of Mind
Weights and Measures

Figure

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  Fig. 1 Correct rate of each item of video-based social cognition scale according to diagnosis.

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  Fig. 2 Item characteristics curves, item information curves, and test information function. A : Item characteristic curves of each item. The relationship between the probability of correct response to each item and the participant's ability. B : Item informative curves of each item. The amount of item information (estimated participants' ability) is plotted against ability. C : Test informative curve. The sum of all item informative curves in the test.

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