Examining the psychometric properties of a crisis recovery in psychosis (CRISP) measure
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Background
Psychotic crises are complex idiosyncratic experiences and currently there are no validated measure which examine the recovery from such experiences. The aim of this study was to develop and psychometrically validate the crisis recovery in psychosis (CRISP) measure.
Methods
The 23-item CRISP was developed in partnership with a coproduction group of people with lived experience, family/carers and clinicians who had experience of mental health crisis care. A longitudinal design was adopted with 80 participants participating in the study, completing the CRISP along with other relevant measure at three time points to psychometrically validate it. The CRISP was examined for internal consistency, test-retest reliability, criterion validity, construct validity, sensitivity to change and floor and ceiling effects.
Results
Initial examination of item performance resulted in 9 items being removed due to low correlations (<0.2) with other items. A principal components varimax rotation produced a 3-factor solution, which included 14-items. The measure was demonstrated to be internally reliable (Cronbach alpha= 0.912 (CI: 0.880 - 0.938, p <0.001)) and reproducible (Cronbach alpha= 0.842 (CI: 0.742 to 0.904,p<0.001). The measure was also deemed to be valid and demonstrated criterion validity, construct validity, and sensitivity to change. No floor or ceiling effects were identified.
Conclusion
The CRISP is a simple, reliable, and valid measure of psychotic crisis recovery that measure core outcomes relevant to inpatient/crisis populations. Future research needs to be undertaken to examine its interpretability.
