title: Investigating theoretical explanations for behaviour change: the case study of ProActive.
abstract: Developing more effective behavioural interventions requires an understanding of the mechanisms of behaviour change, and methods to rigorously test their theoretical basis. The delivery and theoretical basis of an intervention protocol were assessed in ProActive, a UK trial of an intervention to increase the physical activity of those at risk of Type 2 diabetes (N = 365). In 108 intervention sessions, behaviours of facilitators were mapped to four theories that informed intervention development and behaviours of participants were mapped to 17 theoretical components of these four theories. The theory base of the intervention specified by the protocol was different than that delivered by facilitators, and that received by participants. Of the intervention techniques delivered, 25% were associated with theory of planned behaviour (TPB), 42% with self-regulation theory (SRT), 24% with operant learning theory (OLT) and 9% with relapse prevention theory (RPT). The theoretical classification of participant talk showed a different pattern, with twice the proportion associated with OLT (48%), 21% associated with TPB, 31% with SRT and no talk associated with RPT. This study demonstrates one approach to assessing the extent to which the theories used to guide intervention development account for any changes observed.
authors.affiliation: a Department of Psychology , University College London , 1-19 Torrington Place , London WC1E 7HB , UK.
authors.forename: Susan
authors.initials: S
authors.lastname: Michie
authors.forename: Wendy
authors.initials: W
authors.lastname: Hardeman
authors.forename: Tom
authors.initials: T
authors.lastname: Fanshawe
authors.forename: A Toby
authors.initials: AT
authors.lastname: Prevost
authors.forename: Lyndsay
authors.initials: L
authors.lastname: Taylor
authors.forename: Ann Louise
authors.initials: AL
authors.lastname: Kinmonth
mesh_terms: D000328:Adult; D001521:Behavior Therapy / Q000379:methods*; D003924:Diabetes Mellitus, Type 2 / Q000517:prevention & control*; D005500:Follow-Up Studies; D015438:Health Behavior; D006801:Humans; D009043:Motor Activity; D011582:Psychological Theory; D012306:Risk; D013637:Tape Recording; D016896:Treatment Outcome; D006113:United Kingdom
keywords: Theory; behaviour change; behavioural interventions; physical activity; process evaluation