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Health Psychol. 2010 Jan;29(1):1-8. doi: 10.1037/a0016939.

Are interventions theory-based? Development of a theory coding scheme.

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  • 1Centre for Outcomes Research and Effectiveness, University College London, UK. s.michie@ucl.ac.uk

Abstract

OBJECTIVE:

Interventions are increasingly described as theory-based; however, the basis for this is often not clear. Advancing behavioral science requires a good understanding of how interventions are informed by, and test, theory. This study aims to develop a reliable method for assessing the extent to which behavioral interventions are theory-based.

DESIGN:

The reliability, usability, and comprehensiveness of an initial coding scheme were improved in 13 iterative stages on the basis of its application to 29 papers, from a systematic review of interventions to promote physical activity and healthy eating.

RESULTS:

The final Theory Coding Scheme contained 19 items, each with satisfactory interrater reliabilities, coding whether a theory or model was mentioned, how theories were used in intervention design, how intervention evaluations tested theory, and the implications of the results for future theory development.

CONCLUSION:

The Theory Coding Scheme is an important methodological innovation, providing a research tool to reliably describe the theoretical base of interventions, inform evidence syntheses within literature reviews and meta-analyses, and stimulate the use of empirical data for theory development.

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PMID:
20063930
[PubMed - indexed for MEDLINE]
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