Article

A Rasch analysis of the Stroke
Self-efficacy Questionnaire (SSEQ) was undertaken to establish its use as a
clinically meaningful and scientifically rigorous measure. METHODS: One hundred
and eighteen stroke patients completed the SSEQ with the help of an interviewer.
Participants were recruited from local acute stroke units and community stroke
rehabilitation teams. Data were analysed with confirmatory factor analysis
conducted using AMOS and Rasch analysis conducted using RUMM2030 software.
RESULTS: Confirmatory factor analysis and Rasch analyses demonstrated the
presence of two separate scales that measure stroke survivors' self-efficacy
with: i) self-management and ii) functional activities. Guided by Rasch analyses,
the response categories of these two scales were collapsed from an 11-point to a
4-point scale. Modified scales met the expectations of the Rasch model. Items
satisfied the Rasch requirements (overall and individual item fit, local response
independence, differential item functioning, unidimensionality). Furthermore, the
two subscales showed evidence of good construct validity. CONCLUSIONS: The new
SSEQ has good psychometric properties and is a clinically useful assessment of
self-efficacy after stroke. The scale measures stroke survivors' self-efficacy
with self-management and activities as two unidimensional constructs. It is
recommended for use in clinical and research interventions, and in evaluating
stroke self-management interventions.

Langue : ANGLAIS