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Measurement of activity limitations and participation restrictions: Examination of ICF-linked content and scale properties of the PC-part and FIM instruments
Darzins, Susan Imms, Christine Di Stefano, Marilyn
Darzins, Susan
Imms, Christine
Di Stefano, Marilyn
Abstract
Purpose: To explore the operationalization of activity and participation-related measurement constructs through comparison of item phrasing, item response categories and scoring (scale properties) for two separate instruments targeting activities of daily living.
Method: Personal Care Participation Assessment and Resource Tool (PC-PART) item content was linked to ICF categories using established linking rules. Previously reported ICF-linked FIM content categories and ICF-linked PC-PART content categories were compared to identify common ICF categories between the instruments. Scale properties of both instruments were compared using a patient scenario to explore the instruments’ separate measurement constructs.
Results: The PC-PART and FIM shared 15 of the 53 level two ICF-linked categories identified across both instruments. Examination of the instruments’ scale properties for items with overlapping ICF content, and exploration through a patient scenario, provided supportive evidence that the instruments measure different constructs.
Conclusions: While the PC-PART and FIM share common ICF-linked content, they measure separate constructs. Measurement construct was influenced by the instruments’ scale properties. The FIM was observed to measure activity limitations and the PC-PART measured participation restrictions. Scrutiny of instruments’ scale properties in addition to item content is critical in the operationalization of activity and participation-related measurement constructs.
Keywords
Activities of daily living, content validity, International Classification of Functioning Disability and Health, linking studies, measurement, PC-PART
Date
2017
Type
Journal article
Journal
Disability and Rehabilitation
Book
Volume
39
Issue
10
Page Range
1025-1038
Article Number
ACU Department
School of Allied Health
Faculty of Health Sciences
Faculty of Health Sciences
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Relation URI
Source URL
Event URL
Open Access Status
License
File Access
Controlled