Related Experiment Videos
Efficacy and effectiveness approaches in behavioral treatment trials
Justin M Nash1, Douglas McCrory, Robert A Nicholson
1Centers for Behavioral and Preventive Medicine, Brown Medical School and The Miriam Hospital, Providence, RI 02903, USA.
Headache
|June 15, 2005
Summary
This study clarifies the difference between efficacy and effectiveness in behavioral treatments for primary headache. It proposes a complementary, three-phase model for developing and implementing these treatments in real-world settings.
Area of Science:
- Behavioral Science
- Clinical Psychology
- Neuroscience
Background:
- Efficacy studies assess behavioral treatments in controlled settings, prioritizing internal validity.
- Effectiveness studies evaluate treatments in real-world clinical practice, prioritizing external validity.
- Both approaches have limitations in fully informing treatment development and implementation.
Purpose of the Study:
- To distinguish between efficacy and effectiveness in behavioral treatments for primary headache.
- To explore complementary uses of efficacy and effectiveness approaches.
- To propose a model for evaluating behavioral treatments from development to dissemination.
Main Methods:
- Review of efficacy and effectiveness study designs.
- Discussion of internal and external validity in treatment research.
- Proposal of a three-phase linear progression model for behavioral treatment studies.
Main Results:
- Efficacy studies offer high internal validity but limited generalizability.
- Effectiveness studies provide real-world applicability but weaker causal inference.
- A phased model integrating pilot, efficacy, and effectiveness testing is presented.
Conclusions:
- Efficacy and effectiveness approaches are distinct but complementary.
- A phased model enhances the evaluation of behavioral treatments for primary headache.
- This model supports evidence-based implementation across diverse clinical settings.