Theory-based interventions generally produce greater behavior changes among participants compared to non-theory-based interventions.

Theory-based interventions are grounded in behavioral theories and models, which help to explain why people engage in certain behaviors and how to change those behaviors. The use of theory in intervention design can increase the effectiveness of the intervention by targeting specific cognitive and behavioral processes that influence behavior change. Therefore, theory-based interventions generally produce greater behavior changes among participants compared to interventions that are not based on theory.