Development and continuing validation of the Comprehensive assessment of Acceptance and Commitment Therapy processes (CompACT)

Extant ACT process measures are typically circumscribed in their focus and have been subject to critique in terms of validity and conflation with distress measurement. In this presentation, we describe the development and ongoing validation of a new general measure of ACT processes (the CompACT). In phase one, ACT experts rated the face and content validity of 106 items using a Delphi consensus methodology, producing an initial 37-item measure. In phase two, a general population sample (N=377) completed this measure; exploratory factor analysis suggested a theoretically-coherent three-factor structure for a 23-item version of the CompACT. Work from these phases was recently published in JCBS. During this presentation, phase-three results (confirmatory factor analysis and assessment of test-retest reliability, using an independent sample [N~440]) will be reported for the first time. Results from previous phases indicate that the CompACT holds promise as a valid measure of general ACT processes.