Predicting Therapists' Intentions to Use Innovations: Comparing the Role of Individual, Organizational, and Innovation Characteristics.

Theories emphasize the role of individual and organizational characteristics in implementation outcomes, yet research indicates that these characteristics account for only a small amount of variance in those outcomes. Innovation characteristics might be important proximal determinants of implementation outcomes but are infrequently examined in mental health services research. This study examined the relative variance explained by individual, organizational, and innovation characteristics on behavioral intentions, a central implementation outcome in implementation theories. Data were collected from 95 therapists and 28 supervisors who participated in a cluster randomized trial that tested the effectiveness of two clinical decision-making innovations. Multilevel models compared individual, organizational, and innovation characteristics as predictors of therapists' intentions to use the innovations. Subsequent mediational path analyses tested whether innovation characteristics mediated the effect of innovation type on intentions. Individual and organizational characteristics explained 29% of the variability in therapists' intentions. Approximately 75% of the variability in therapists' intentions was accounted for by innovation characteristics. Individual and organizational characteristics were not statistically significant predictors of intentions after controlling for innovation characteristics. The indirect effect of innovation type on intentions through therapists' beliefs was statistically significant (B = 0.410, 95% Bootstrapped CI = [0.071, 0.780]), but the direct effect of innovation type was not (B = 0.174, p = .365). Innovation characteristics are related to therapist intentions and might explain why some innovations are received more favorably than others. Future studies should explore the complex interrelationships between these beliefs alongside other individual or organizational characteristics.