Intrinsic Motivation Scale

The Intrinsic Motivation Scale (Gaitan-Sierra & Hyland, 2015) was developed within the context of a study investigating three common factor mechanisms that could affect outcome in clinical practice: response expectancy, the affective expectation model, and motivational concordance. The study sample included clients from clinics in Mexico (18+ years). Intrinsic motivation was measured using three items based on content suggested by existing theory in intrinsic motivation (e.g., Csikszentmilhalyi, 1990; Deci & Ryan, 1985; Waterman et al., 2003). The items focused on enjoyment, interest, and if the individual thought they learned new things about themselves during the gestalt/sophrology/homeopathic-therapy/technique/treatment. Responses were made on a seven-point scale ranging from 1 (strongly disagree) to 7 (strongly agree). An index of intrinsic motivation was created by summing participants’ ratings for the three items, where high scores indicate greater intrinsic motivation. The internal consistency reliability of the scale was acceptable (Cronbach’s α = 0.88).