Validating independent ratings of executive functioning following acquired brain injury using Rasch analysis

Simblett, Sara K, Badham, Rachel, Greening, Kate, Adlam, Anna, Ring, Howard and Bateman, Andrew (2012) Validating independent ratings of executive functioning following acquired brain injury using Rasch analysis. Neuropsychological Rehabilitation, 22 (6). pp. 874-889. ISSN 1464-0694

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Assessment of everyday problems with executive functioning following acquired brain injury (ABI) is greatly valued by neurorehabilitation services. Reliance on self-report measures alone is problematic within this client group who may experience difficulties with awareness and memory. The construct validity and reliability of independent ratings (i.e., ratings provided by a carer/relative) on the Dysexecutive Questionnaire (DEX-I) was explored in this study. Consistent with the results recently reported on the self-rated version of the DEX (DEX-S; Simblett & Bateman, 2011 ), Rasch analysis completed on 271 responses to the DEX-I revealed that the scale did not fit the Rasch model and did not meet the assumption of unidimensionality, that is, a single underlying construct could not be found for the DEX-I that would allow development of an interval-level measure as a whole. Subscales, based on theoretical conceptualisations of executive functioning (Stuss, 2007 ) previously suggested for the DEX-S, were able to demonstrate fit to the Rasch model and unidimensionality. Reliability of independent responses to these subscales in comparison to self-reported ratings is discussed. These results contribute to a greater understanding of how assessment of executive functioning can be improved.

Item Type: Article
Uncontrolled Keywords: severity of illness index,questionnaires,reproducibility of results,chi-square distribution,humans,longitudinal studies,cognition disorders,disability evaluation,statistics as topic,executive function,brain injuries,neuropsychological tests,female,male
Faculty \ School: Faculty of Medicine and Health Sciences > Norwich Medical School
Depositing User: Pure Connector
Date Deposited: 24 Jul 2013 13:10
Last Modified: 18 Nov 2022 17:30
DOI: 10.1080/09602011.2012.703956

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