Article

OBJECTIVE: To investigate the psychometric properties of the Rivermead Motor
Assessment by Rasch analysis and conventional statistics to improve its clinical utility. METHODS: A total of 107 patients after stroke were evaluated using the
Rivermead Motor Assessment and Functional Independence Measure (FIM). Scaling
properties were assessed using Mokken scaling, internal construct validity using
Rasch analysis, reliability using Cronbach's alpha and intra-class correlation
coefficients, external construct validity through convergent validity with FIM,
and responsiveness using the effect size and standardized response mean. RESULTS:
Cronbach's alpha and intra-class correlation coefficients for 3 sections of the
Rivermead Motor Assessment were between 0.88 and 0.95. Mokken scaling showed
appropriate Guttman patterns, but the hierarchical ordering of the items differed
from that of the original.
After removing 4 items of gross function, 1 of
leg-trunk, and 4 of arm, all sections met Rasch model expectations. External
construct validity was confirmed. Mean values of effect size and standardized
response were 0.38-0.51 and 0.60-0.89, respectively. CONCLUSION: The Rivermead
Motor Assessment has been shown to be reliable and responsive. Guttman scaling is
apparent, but not as originally defined. After removing some items, the scale
satisfies the most stringent Rasch measurement criteria and can produce interval
scaling for the assessment of motor function in stroke.

Langue : ANGLAIS