Construct validity of the Depression and Somatic Symptoms Scale: evaluation by Mokken scale analysis

Ya-Hsin Chou,1 Chin-Pang Lee,1,2 Chia-Yih Liu,1,2 Ching-I Hung1,2 1Department of Psychiatry, Chang-Gung Memorial Hospital at Linkou, 2School of Medicine, Chang Gung University College of Medicine, Taoyuan, Taiwan Objective: Previous studies of the Depression and Somatic Symptoms Scale (DSSS), a fr...

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Autores principales: Chou YH, Lee CP, Liu CY, Hung CI
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Publicado: Dove Medical Press 2017
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spelling oai:doaj.org-article:3269fc97a11945879b661ec65da30ec32021-12-02T05:03:59ZConstruct validity of the Depression and Somatic Symptoms Scale: evaluation by Mokken scale analysis1178-2021https://doaj.org/article/3269fc97a11945879b661ec65da30ec32017-01-01T00:00:00Zhttps://www.dovepress.com/construct-validity-of-the-depression-and-somatic-symptoms-scale-evalua-peer-reviewed-article-NDThttps://doaj.org/toc/1178-2021Ya-Hsin Chou,1 Chin-Pang Lee,1,2 Chia-Yih Liu,1,2 Ching-I Hung1,2 1Department of Psychiatry, Chang-Gung Memorial Hospital at Linkou, 2School of Medicine, Chang Gung University College of Medicine, Taoyuan, Taiwan Objective: Previous studies of the Depression and Somatic Symptoms Scale (DSSS), a free scale, have been based on the classical test theory, and the construct validity and dimensionality of the DSSS are as yet uncertain. The aim of this study was to use Mokken scale analysis (MSA) to assess the dimensionality of the DSSS.Methods: A sample of 214 psychiatric outpatients with mood and anxiety disorders were enrolled at a medical center in Taiwan (age: mean [SD] =38.3 [10.5] years; 63.1% female) and asked to complete the DSSS. MSA was used to assess the dimensionality of the DSSS.Results: All 22 items of the DSSS formed a moderate unidimensional scale (Hs=0.403), supporting its construct validity. The DSSS was divided into 4 subscales (Hs ranged from 0.35 to 0.67), including a general somatic scale (GSS), melancholic scale (MS), muscular pain scale (MPS), and chest symptom scale (CSS). The GSS is a weak reliable Mokken scale; the other 3 scales are strong reliable Mokken scales.Conclusion: The DSSS is a psychometrically sound measure of depression and somatic symptoms in adult psychiatric outpatients with depression or anxiety. The summed score of the DSSS and its 4 subscales are valid statistics. Further research is required for replication of the 4 subscales of the DSSS. Keywords: depression, somatization, Mokken scale analysis, item response theory, construct validityChou YHLee CPLiu CYHung CIDove Medical PressarticledepressionsomatizationMokken scale analysisitem response theoryconstruct validity.Neurosciences. Biological psychiatry. NeuropsychiatryRC321-571Neurology. Diseases of the nervous systemRC346-429ENNeuropsychiatric Disease and Treatment, Vol Volume 13, Pp 205-211 (2017)
institution DOAJ
collection DOAJ
language EN
topic depression
somatization
Mokken scale analysis
item response theory
construct validity.
Neurosciences. Biological psychiatry. Neuropsychiatry
RC321-571
Neurology. Diseases of the nervous system
RC346-429
spellingShingle depression
somatization
Mokken scale analysis
item response theory
construct validity.
Neurosciences. Biological psychiatry. Neuropsychiatry
RC321-571
Neurology. Diseases of the nervous system
RC346-429
Chou YH
Lee CP
Liu CY
Hung CI
Construct validity of the Depression and Somatic Symptoms Scale: evaluation by Mokken scale analysis
description Ya-Hsin Chou,1 Chin-Pang Lee,1,2 Chia-Yih Liu,1,2 Ching-I Hung1,2 1Department of Psychiatry, Chang-Gung Memorial Hospital at Linkou, 2School of Medicine, Chang Gung University College of Medicine, Taoyuan, Taiwan Objective: Previous studies of the Depression and Somatic Symptoms Scale (DSSS), a free scale, have been based on the classical test theory, and the construct validity and dimensionality of the DSSS are as yet uncertain. The aim of this study was to use Mokken scale analysis (MSA) to assess the dimensionality of the DSSS.Methods: A sample of 214 psychiatric outpatients with mood and anxiety disorders were enrolled at a medical center in Taiwan (age: mean [SD] =38.3 [10.5] years; 63.1% female) and asked to complete the DSSS. MSA was used to assess the dimensionality of the DSSS.Results: All 22 items of the DSSS formed a moderate unidimensional scale (Hs=0.403), supporting its construct validity. The DSSS was divided into 4 subscales (Hs ranged from 0.35 to 0.67), including a general somatic scale (GSS), melancholic scale (MS), muscular pain scale (MPS), and chest symptom scale (CSS). The GSS is a weak reliable Mokken scale; the other 3 scales are strong reliable Mokken scales.Conclusion: The DSSS is a psychometrically sound measure of depression and somatic symptoms in adult psychiatric outpatients with depression or anxiety. The summed score of the DSSS and its 4 subscales are valid statistics. Further research is required for replication of the 4 subscales of the DSSS. Keywords: depression, somatization, Mokken scale analysis, item response theory, construct validity
format article
author Chou YH
Lee CP
Liu CY
Hung CI
author_facet Chou YH
Lee CP
Liu CY
Hung CI
author_sort Chou YH
title Construct validity of the Depression and Somatic Symptoms Scale: evaluation by Mokken scale analysis
title_short Construct validity of the Depression and Somatic Symptoms Scale: evaluation by Mokken scale analysis
title_full Construct validity of the Depression and Somatic Symptoms Scale: evaluation by Mokken scale analysis
title_fullStr Construct validity of the Depression and Somatic Symptoms Scale: evaluation by Mokken scale analysis
title_full_unstemmed Construct validity of the Depression and Somatic Symptoms Scale: evaluation by Mokken scale analysis
title_sort construct validity of the depression and somatic symptoms scale: evaluation by mokken scale analysis
publisher Dove Medical Press
publishDate 2017
url https://doaj.org/article/3269fc97a11945879b661ec65da30ec3
work_keys_str_mv AT chouyh constructvalidityofthedepressionandsomaticsymptomsscaleevaluationbymokkenscaleanalysis
AT leecp constructvalidityofthedepressionandsomaticsymptomsscaleevaluationbymokkenscaleanalysis
AT liucy constructvalidityofthedepressionandsomaticsymptomsscaleevaluationbymokkenscaleanalysis
AT hungci constructvalidityofthedepressionandsomaticsymptomsscaleevaluationbymokkenscaleanalysis
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