Charles Abraham1, Caroline E Wood2, Marie Johnston2,3, Jill Francis4, Wendy Hardeman5, Michelle Richardson6, Susan Michie6. 1. Psychology Applied to Health Group, University of Exeter Medical School, University of Exeter, St Luke's Campus, Exeter, EX1 2 LU, UK. C.Abraham@exeter.ac.uk. 2. Research Department of Clinical, Educational and Health Psychology, University College London, 1-19 Torrington Place, London, WC1E 7HB, UK. 3. Institute of Applied Health Sciences, College of Life Science and Medicine, University of Aberdeen, 2nd Floor, Health Sciences Building, Aberdeen, AB25 2ZD, UK. 4. School of Health Sciences, City University London, Myddelton Street Building, Northampton Square, London, EC1V 0HB, UK. 5. Primary Care Unit, Cambridge Institute of Public Health, University of Cambridge, Forvie Site, Robinson Way, Cambridge, CB2 0SR, UK. 6. Evidence for Policy and Practice Information and Coordinating Centre, Social Science Research Unit, UCL Institute of Education, London, UK.
Abstract
PURPOSE: The aim of this paper is to assess the frequency of identification as well as the inter-coder and test-retest reliability of identification of behavior change techniques (BCTs) in written intervention descriptions. METHODS: Forty trained coders applied the "Behavior Change Technique Taxonomy version 1" (BCTTv1) to 40 intervention descriptions published in protocols and repeated this 1 month later. RESULTS: Eighty of 93 defined BCTs were identified by at least one trained coder, and 22 BCTs were identified in 16 (40 %) or more of 40 descriptions. Good inter-coder reliability was observed across 80 BCTs identified in the protocols: 66 (80 %) achieved mean prevalence and bias-adjusted kappa (PABAK) scores of 0.70 or greater, and 59 (74 %) achieved mean scores of 0.80 or greater. There was good within-coder agreement between baseline and 1 month, demonstrating good test-retest reliability. CONCLUSIONS: BCTTv1 can be used by trained coders to identify BCTs in intervention descriptions reliably. However, some frequently occurring BCT definitions require further clarification.
PURPOSE: The aim of this paper is to assess the frequency of identification as well as the inter-coder and test-retest reliability of identification of behavior change techniques (BCTs) in written intervention descriptions. METHODS: Forty trained coders applied the "Behavior Change Technique Taxonomy version 1" (BCTTv1) to 40 intervention descriptions published in protocols and repeated this 1 month later. RESULTS: Eighty of 93 defined BCTs were identified by at least one trained coder, and 22 BCTs were identified in 16 (40 %) or more of 40 descriptions. Good inter-coder reliability was observed across 80 BCTs identified in the protocols: 66 (80 %) achieved mean prevalence and bias-adjusted kappa (PABAK) scores of 0.70 or greater, and 59 (74 %) achieved mean scores of 0.80 or greater. There was good within-coder agreement between baseline and 1 month, demonstrating good test-retest reliability. CONCLUSIONS: BCTTv1 can be used by trained coders to identify BCTs in intervention descriptions reliably. However, some frequently occurring BCT definitions require further clarification.
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