Rasch Analysis of the Revised Dyadic Adjustment Scale (RDAS) with Military Couples
The quality of a romantic relationship can have serious implications for individual well-being. As such, it is important that we are able to accurately measure romantic relationship quality, also known as dyadic adjustment, in order to conduct rigorous studies that include this construct. The Revised Dyadic Adjustment Scale (RDAS; Busby et al., J Marital Fam Ther 21:289–308, 1995), a more concise and valid version of the frequently used Dyadic Adjustment Scale (DAS; Spanier, J Marriage Fam 38:15–28, 1976), was developed to accurately measure dyadic adjustment. However, the RDAS has yet to be validated using advanced measurement techniques. This study specifically evaluated the RDAS using Rasch modeling in a sample of military couples, a population at high risk for relationship challenges due to the deployment process. Evaluation of the RDAS using Rasch modeling confirmed that it serves as both a global and multidimensional scale, with only minor revisions recommended to help improve its validity.
KeywordsRasch modeling Relationship adjustment Couples
This work was supported by the Office of the Assistant Secretary of Defense for Health Affairs through the Psychological Health/Traumatic Brain Injury Research Program under Award Nos. W81XWH-12-1-0419 and 0418 (Blow, PI; Gorman, Partnering PI). Pre-deployment data collection was supported by the Rachel Upjohn Clinical Scholars Award and the Berman Research Fund at the University of Michigan, Depression Center as well as the College of Social Science and the Department of Human Development and Family Studies at Michigan State University.
Compliance with Ethical Standards
Conflict of interest
There were no conflicts of interest, financial or otherwise.
Approvals were obtained from the relevant Institutional Review Boards as well as the USAMRMC Office of Research Protections prior to any data collection.
Informed consent was also given by all individuals prior to their participation in the study.
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