Assessing and adjusting for cross cultural validity of impairment and activity limitation scales through Differential Item Functioning within the framework of the Rasch model: the Pro-ESOR project
Articolo
Data di Pubblicazione:
2004
Citazione:
Assessing and adjusting for cross cultural validity of impairment and activity limitation scales through Differential Item Functioning within the framework of the Rasch model: the Pro-ESOR project / A. Tennant, M. Penta, L. Tesio, G. Grimby, JL. Thonnard, A. Slade, G. Lawton, A. Simone, J. Carter, A. Lundgren-Nilsson, M. Tripolski, H. Ring, F. Biering-Sørensen, C. Marincek, H. Burger, S. Phillips. - In: MEDICAL CARE. - ISSN 0025-7079. - 42:Suppl. 1(2004), pp. I37-I48.
Abstract:
INTRODUCTION: In Europe it is common for outcome measures to be translated for
use in other languages. This adaptation may be complicated by culturally specific
approaches to certain tasks; for example, bathing. In this context the issue of
cross-cultural validity becomes paramount.
OBJECTIVE: To facilitate the pooling of data in international studies, a project
set out to evaluate the cross-cultural validity of impairment and activity
limitation measures used in rehabilitation from the perspective of the Rasch
measurement model.
METHODS: Cross-cultural validity is assessed through an analysis of Differential
Item Functioning (DIF) within the context of additive conjoint measurement
expressed through the Rasch model. Data from patients undergoing rehabilitation
for stroke was provided from 62 centers across Europe. Two commonly used outcome
measures, the Mini-Mental State Examination (MMSE) and the Functional
Independence Measure (FIM) motor scale are used to illustrate the approach.
RESULTS: Pooled data from 3 countries for the MMSE were shown to fit the Rasch
model with only 1 item displaying DIF by country. In contrast, many items from
the FIM expressed DIF and misfit to the model. Consequently they were allowed to
be unique across countries, so resolving the lack of fit to the model.
CONCLUSIONS: Where data are to be pooled for international studies, analysis of
DIF by culture is essential. Where DIF is observed, adjustments can be made to
allow for cultural differences in outcome measurement.
Tipologia IRIS:
01 - Articolo su periodico
Elenco autori:
A. Tennant, M. Penta, L. Tesio, G. Grimby, JL. Thonnard, A. Slade, G. Lawton, A. Simone, J. Carter, A. Lundgren-Nilsson, M. Tripolski, H. Ring, F. Biering-Sørensen, C. Marincek, H. Burger, S. Phillips
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