Article

This study examined the psychometric properties of the positive and negative
affect schedule (PANAS) in a post-polio sample and the relationship of these
affect the dimensions. METHOD: Exploratory factor analysis (EFA) was performed
with sample 1 (randomly selected from the total sample), to examine the
underlying dimensions of the PANAS. Confirmatory factor analyses (CFA) were
performed with samples 2 and 1 to assess the fit of the models to the data. Model
fit tests were based on the chi(2) likelihood ratio test, comparative fit index
(CFI), and root mean square estimate of approximation (RMSEA). RESULTS: In the
EFA phase, two factors were extracted and oblique rotation was applied to
interpret pattern of loadings. In the CFA phase, both samples 1 and 2, model fit
tests demonstrated that the models were unsatisfactory and indicated poor fit of
the model to the observed data. Post-hoc model fitting of three error
correlations as indicated by modification indices, proved a better fit for both
samples. CONCLUSIONS: The results of the factor analyses suggested the
possibility of a third dimension reflecting negative affect and that affect may
consist of more than two general dimensions in the context of disability. In
post-polio population, some of the symptoms of negative affect may be caused by
physical symptoms that are related to the disability experience.

Langue : ANGLAIS