Evaluating the factor structure of the Multidimensional Psychological Flexibility Inventory: An independent replication and extension

Abstract The Multidimensional Psychological Flexibility Inventory (MPFI) is a recently-developed measure of the Hexaflex/Inflexahex conceptualization of Acceptance and Commitment Therapy. The replicability of the factor structure has yet to be independently investigated, and the factor structure of the short form has not been investigated at all. A sample of 314 college undergraduates provided MPFI data. A confirmatory factor analysis replicated the putative 12-factor structure for the long form of the measure. An exploratory factor analysis of the short form revealed a 12-factor structure consistent with that reported for the long form, and a subsequent confirmatory factor analysis of the short form provided further support. The present study supports the proposed factor structure of both the full scale and short form of the MPFI.