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Test-retest stability, convergent validity, and sensitivity to change for the Goal-Based Outcome tool for
Charlie Duncan1,2, Mick Cooper2, David Saxon3
1Department of Psychology, University of Roehampton, London, UK.
Objective(S):
To examine the psychometric properties of the idiographic Goal-Based Outcome (GBO) tool for young people: test-retest stability, convergent validity, and sensitivity to an intervention.
Methods:
This measure validation study used data from a randomized controlled trial of school-based humanistic counseling. We used multilevel analyses to assess test-retest stability, convergent validity of the GBO tool against nomothetic measures of mental wellbeing, and sensitivity to an intervention.
Results:
The GBO tool showed acceptable stability over a 6-24 week period; moderate convergent validity with nomothetic measures of mental well-being, self-esteem, and depression; and greater sensitivity to an intervention than a measure of psychological distress.
Conclusions:
The GBO tool shows evidence of having acceptable psychometric properties and is suitable for monitoring change on individual goals. It may also have the capacity to function as a population-level indicator of outcomes in conjunction with the use of other measures of mental health and wellbeing.
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