Article

OBJECTIVES: To compare the functioning of the 101-point response format of the
Wheelchair Use Confidence Scale (WheelCon) with shortened 11-point formats, and
to evaluate the scale's measurement properties using principal components and
Rasch analyses. DESIGN: Secondary analysis of cross-sectional data. SETTING:
Community. PARTICIPANTS: Volunteer participants were manual wheelchair users
(N=220) >/=19 years of age, with >/=6 months' experience with daily wheelchair
use and no cognitive impairment. INTERVENTIONS: None. MAIN OUTCOME MEASURE:
65-item WheelCon. RESULTS: The 11-point response format outperformed the original
101-point format. Principal component analyses confirmed the presence of 2
dimensions: mobility efficacy and self-management efficacy. Thirteen items in the
mobility efficacy subscale and 8 items in the self-management efficacy subscale
fit the Rasch Rating Scale model. Five items misfit the model developed using the
21 items from both subscales. In each of the 13- and 8-item subscales, and the
21-item short form, the 2 lowest and highest scores had internal consistency
reliability estimates <.70; all other scores had reliability estimates >.70.
CONCLUSIONS: The WheelCon is composed of 2 dimensions. The recoded measurements
using a 0-to-10 response scale from the 13-item mobility and 8-item
self-management efficacy subscales have good reliability, as do the measurements
from the 21-item WheelCon Short Form. The use of the subscales, the short form,
or both, depends on the context in which they are being considered. Research to
establish the reliability and validity of the measurements using the 0-to-10
response format is warranted.
CI - Copyright (c) 2015 American Congress of Rehabilitation Medicine. Published by
Elsevier Inc. All rights reserved.

Langue : ANGLAIS