The most distinctive feature of PSYCHLOPS is that it is highly sensitive to change.
PSYCHLOPS elicits psychometric information covering three domains: Problems, Function and Wellbeing.
Responsiveness to change is measured using the Effect Size
- UK based validation studies using PSYCHLOPS have found Effect Sizes of 1.53 and 1.61 (Effect Sizes >0.80 are generally considered large for health service related outcomes)
- Captures improvement, or otherwise, during and after the course of therapy.
- Test-retest reliability: intra-class correlation coefficient, 0.70
- Internal reliability: alpha scores, 0.75 pre-therapy and 0.83 post-therapy
- Convergent validity: Spearman’s rho, 0.61 (comparison with CORE-OM); Spearman’s rho, 0.47 (comparison with HADS)
- Concurrent validity: t = -6.30; P<0.001; comparison of scores of patient self-report ‘much better’ compared with ‘a little better’
- Freetext responses: may contribute usefully to the process of therapy and provide rich source of material for qualitative analysis.