Evidence map›Paper›PMID 28373798›Full record

ArticleNoro psikiyatri arsivi2016

The Turkish Adaptation, Validity, and Reliability of the Internal States Scale.

Zeynep Maçkali, Cengiz Akkaya, Ömer Aydemir

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Article in Noro psikiyatri arsivi, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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5 · Who and what money

Authors and funding

3 authors.

Zeynep MaçkaliDepartment of Psychology, Yeni Yüzyıl University, İstanbul, Turkey.
Cengiz AkkayaDepartment of Psychiatry, Uludağ University School of Medicine, Bursa, Turkey.
Ömer AydemirDepartment of Psychiatry, Celal Bayar University School of Medicine, Manisa, Turkey.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

introductionThe Internal State Scale (ISS) was developed to simultaneously assess manic and depressive symptoms in bipolar disorder. In the present study, the validity and reliability of the Turkish version of ISS (ISS-TR) were examined. The present study aimed to present the psychometric properties of this scale.

methodsThe sample consisted of 200 outpatients with bipolar disorder and 49 healthy controls. Participants completed the Turkish Internal State Scale (ISS-TR), the Brief Psychiatric Rating Scale (BPRS), the Hamilton Depression Rating Scale (HDRS), and the Young Mania Rating Scale (YMRS).

resultsReliability analyses revealed that the Cronbach alfa coefficient of ISS was 0.88 for the whole sample. Item-total correlations ranged from 0.15 to 0.78. Two factors emerged as a result of factor analysis: "mania" and "depression-well-being." Test-retest correlations were determined for the mania subscale as r=0.654, p<0.01 and for the depression-well-being subscale as r=0.356, p<0.01. The correlations between BPRS and both subscales were quite high. The correlation between HDRS and the depression-well-being subscale was higher (r=0.475) than that between HDRS and the mania subscale, whereas the correlation between YMRS and the mania subscale was higher (r=0.818) than that between YMRS and the depression-well-being subscale. It was seen that ISS could discriminate between the clinical and healthy control samples. In addition, it was observed that the mania subscale predicted a manic period more strongly, while the depression-well-being subscale predicted a depressive period better.

conclusionISS is a valid and reliable scale that can be used to simultaneously assess manic and depressive symptoms. It is thought that ISS will be useful in the recognition of prodromal symptoms and in the process of maintenance treatment.

Indexed as

Bipolar disorderdepressivemanicself-report

Identifiers

PMID28373798
PMCPMC5378207

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