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The Application of the Theory of Planned Behaviour to Diet in Carers of People with an Intellectual Disability
Author(s) -
Jenkins Catherine M.,
McKenzie Karen
Publication year - 2011
Publication title -
journal of applied research in intellectual disabilities
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.056
H-Index - 63
eISSN - 1468-3148
pISSN - 1360-2322
DOI - 10.1111/j.1468-3148.2010.00594.x
Subject(s) - theory of planned behavior , psychology , predictive power , psychological intervention , social psychology , intellectual disability , variance (accounting) , explained variation , developmental psychology , control (management) , applied psychology , statistics , psychiatry , business , accounting , epistemology , philosophy , management , mathematics , economics
Background The utility of the theory of planned behaviour (TPB) in predicting the intentions of care staff to encourage healthy eating behaviour in those they supported was examined. Method A quantitative, within‐participant, questionnaire based design was used with 112 carers to assess the performance of two TPB models. The first contained the variables: attitude, subjective norm and perceived behavioural control. The second had additional variables of self efficacy and self identity. Results Model 1 accounted for 31% of the variance with all three variables being significant predictors. Adding variables increased the overall predictive power of the model by 4%, but resulted in a reduction in the predictive power of the individual variables. Conclusion The results suggests the TPB is a useful model for predicting carer intentions in relation to the diet of those they support, with their perceptions of the attitudes of others towards healthy eating being a key influential factor. Ways in which this may inform interventions to improve the overall health of people with intellectual disabilities are discussed.