A novel method for assessing design fidelity in web-based behavioral interventions.

OBJECTIVE: Delivery is one of the most common ways assessing fidelity in behavioral interventions. However, there a lack research reporting on how well an intervention protocol reflects its proposed theoretical principles (design fidelity). This study presents systematic method for design and applies it to eMotion web-based targeting physical activity depression. METHOD: The comprises 13 modules, designed according underlying map. An independent rater with expertise behavior change coded presence or absence techniques (BCTs) content eMotion. Results coding were compared designers' priori specification interrater reliability. RESULTS: After discussion, designer had high agreement BCTs relating activation (AC1 = 0.91) demonstration monitoring emotional consequences having lowest < 0.4). There was also 0.88) description then amended align agreement. CONCLUSIONS: novel fidelity. Developers (and other multicomponent) interventions are encouraged develop refine this assess future ensure operationalized as intended. (PsycInfo Database Record (c) 2021 APA, all rights reserved).