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Examining the effects of chronic disease and disability on children's sibling relationships.

Research on siblings of children with a variety of developmental disabilities and major chronic illnesses was reviewed within the context of literatures on typical sibling relationships and family adaptation. Assumptions, questions, and methods guiding current research were analyzed and critiqued. To date, studies have addressed a narrow range of variables and issues—the detection of maladjustment being the primary concern. Further, predominant reliance on more subjective and anecdotal research methods and failure to control for confounding factors limit the value of investigation s. Certain popular beliefs and perceptions have gained support but others have not, in particular the assumption that siblings of handicapped and ill children experience more frequent psychological disturbance. A variable matrix is proposed that may help investigators identify relevant factors, avoid potential confounds, and generate productive hypotheses and research designs.