The symptom rating test subscales: Replicability in a patient setting
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Welch, G., McColl, G., Peace, K. (1989). The Symptom Rating Test Subscales: Replicability in a Patient Setting. Multivariate Experimental Clinical Research, 9(2), 71-82.
The Symptom Rating Test (SRT), (Kellner & Sheffield, 1973), is a symptom state measure of psychological distress that was originally developed for use as a measure of psychological distress that was originally developed for use as a measure of treatment response in pharmacological trials. However, it is notable that the four factor structure of the SRT has not been confirmed in a patient setting and it was therefore decided to investigate this important aspect of the measure's psychometric characteristics using patient responses and replication samples. The results showed that two factors, both with high internal consistencies, were identified. An inspection of the item content of these two factors showed that the original subscales of Anxiety, Depression, and Inadequacy had collapsed together to form that first factor, while the items of the original Somatic subscale had formed the second factor. A further clarification of the pattern of factor loadings was achieved by the subsequent removal of items that did not load highly and clearly on one factor across both samples. This procedure resulted in the removal of 8 items to produce a 22-item SRT that was comprised of a 15-item Anxiety-depression subscale and a 7-item Somatic subscale. The latter two subscales reflect variables that are well-established in previous psychometric studies and appear to warrant further research to determine their clinical utility as sensitive criterion measures of treatment response.