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Published on: February 19, 2021
Using process evaluation for program improvement in dose, fidelity and reach: the ACT trial experience.
Dawn K Wilson1, Sarah Griffin, Ruth P Saunders
1Department of Psychology, University of South Carolina, Columbia, SC, 29208, USA. profdwilson@hotmail.com
Summary
Formative evaluation improved the "Active by Choice Today" (ACT) trial by enhancing intervention delivery and participant reach. This process monitoring ensured fidelity and identified best practices for physical activity interventions in adolescents.
Area of Science:
- Public Health
- Behavioral Science
- Intervention Science
Background:
- The
- Active by Choice Today
- (ACT) trial is a school-based randomized study targeting physical activity in underserved adolescents.
- Formative program process evaluation is crucial for optimizing intervention implementation.
Purpose of the Study:
- To demonstrate the utility of formative program process evaluation in enhancing intervention dose, fidelity, and reach.
- To illustrate the application of process evaluation in a school-based physical activity trial over three years.
Main Methods:
- The ACT intervention integrated Self-Determination Theory and Social Cognitive Theory to boost motivation and skills for long-term physical activity.
- Formative process data were collected and analyzed annually to provide corrective feedback.
- Key changes included enhanced staff training, manual reformatting, and a parent-contact system for attendance.
Main Results:
- Significant changes were implemented between years 1-2 and 2-3 to improve program delivery and participant attendance.
- These modifications led to notable improvements in intervention fidelity, dose, and participant reach.
- Process outcomes indicated successful adjustments to keep the intervention on track.
Conclusions:
- Process evaluation and implementation monitoring are vital for ensuring intervention fidelity in trials.
- These methods help identify best practices for effective intervention delivery.
- Formative evaluation supports the successful execution of public health interventions.
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