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Comparative study of the pencil-and-paper and digital formats of the Spanish DARS scale

Published online by Cambridge University Press:  23 December 2021

Elsa Arrua-Duarte
Affiliation:
Department of Psychiatry, Fundación Jiménez Díaz University Hospital, Madrid, Spain Department of Psychiatry, Autónoma University, Madrid, Spain
Marta Migoya-Borja
Affiliation:
Department of Psychiatry, Fundación Jiménez Díaz University Hospital, Madrid, Spain
Igor Barahona
Affiliation:
Instituto de Matemáticas, Universidad Nacional Autónoma de México, México City, Mexico
Lena C. Quilty
Affiliation:
Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, Toronto, Canada Department of Psychiatry, University of Toronto, Toronto, ON, Canada
Sakina J. Rizvi
Affiliation:
Department of Psychiatry, University of Toronto, Toronto, ON, Canada Arthur Sommer Rotenberg Suicide and Depression Studies Program, St. Michael’s Hospital, Toronto, ON, Canada
Sidney H. Kennedy
Affiliation:
Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, Toronto, Canada Department of Psychiatry, University of Toronto, Toronto, ON, Canada
Enrique Baca-García
Affiliation:
Department of Psychiatry, Fundación Jiménez Díaz University Hospital, Madrid, Spain Department of Psychiatry, Autónoma University, Madrid, Spain Department of Psychiatry, Rey Juan Carlos University Hospital, Móstoles, Spain Department of Psychiatry, General Hospital of Villalba, Madrid, Spain Department of Psychiatry, Infanta Elena University Hospital, Valdemoro, Spain Universidad Católica del Maule, Talca, Chile Department of Adult Psychiatry, University Hospital Nimes, Nimes, France CIBERSAM (Centro de Investigación Biomédica en Red Salud Mental), Carlos III Institute of Health, Madrid, Spain
Maria L. Barrigon*
Affiliation:
Department of Psychiatry, Fundación Jiménez Díaz University Hospital, Madrid, Spain Department of Psychiatry, Virgen del Rocio University Hospital, Seville, Spain
*
Author for correspondence: Maria L. Barrigón, Email: marisabe@gmail.com

Abstract

The Dimensional Anhedonia Rating Scale (DARS) is a novel questionnaire to assess anhedonia of recent validation. In this work, we aim to study the equivalence between the traditional paper-and-pencil and the digital format of DARS. Sixty-nine patients filled the DARS in a paper-based and digital versions. We assessed differences between formats (Wilcoxon test), validity of the scales [Kappa and intraclass correlation coefficients (ICCs)], and reliability (Cronbach’s alpha and Guttman’s coefficient). We calculated the comparative fit index and the root mean squared error (RMSE) associated with the proposed one-factor structure. Total scores were higher for paper-based format. Significant differences between both formats were found for three items. The weighted Kappa coefficient was approximately 0.40 for most of the items. Internal consistency was greater than 0.94, and the ICC for the digital version was 0.95 and 0.94 for the paper-and-pencil version (F = 16.7, p < 0.001). Comparative Adjustment Index was 0.97 for the digital DARS and 0.97 for the paper-and-pencil DARS, and RMSE was 0.11 for the digital DARS and 0.10 for the paper-and-pencil DARS. We concluded that the digital DARS is consistent in many respects with the paper-and-pencil questionnaire, but equivalence with this format cannot be assumed without caution.

Information

Type
Original Article
Copyright
© The Author(s), 2021. Published by Cambridge University Press on behalf of Scandinavian College of Neuropsychopharmacology

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