Calgary Fidelity Scale for First Episode Psychosis Services (CFEPS)

Presentation First Author: 
Donald Addington

Purpose: The purpose of this study was to develop a fidelity scale to assess the degree of implementation of essential evidence-based components for First Episode Psychosis Services (FEPS). Methods: We used a 3 stage knowledge synthesis process: a systematic review of the literature in order to identify service components; a DELPHI consensus-building technique with an international panel of experts; and a construction and pilot testing phase. Results: The literature review identified 1,020 citations, from which 280 peer reviewed articles met criteria for relevance. We identified 75 unique service components and the associated level of supportive evidence. The expert Delphi consensus process reduced the number to 32 components rated as essential. In the final stage we created two versions of the scale; a team version to assess team-based programs, and an individual version to assess the care provided to one individual. This resulted in a team scale comprised of 47 items, 28 of which comprised the individual scale. Each item is comprised of a stem, which describes a service component and a rating scale of 1 to 5, which has a number of descriptors that provide concrete definitions for each rating in the scale. A rating guide supports fidelity evaluations. Conclusions: We have successfully used a sequence of structured knowledge synthesis processes to develop a scale to measure fidelity to evidence-based FEPS. This first version of the scale needs further research to assess interrater reliability, discriminative and predictive validity, but is in a form amenable for further research.

Conference Name: 
Presentation Date: 
January, 2015
Additional Authors: 
Emily McKenzie - Ross Norman - JianLi Wang - Gary Bond
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