Research from this thesis is published in the following articles: 1: Darker CD, Larkin M, French DP. An exploration of walking behaviour--an interpretative phenomenological approach. Social Science & Medicine. 2007 Nov; 65(10): 2172-83. ISSN 0277-9536 doi:10.1016/j.socscimed.2007.06.029 http://dx.doi.org/10.1016/j.socscimed.2007.06.029 2: Darker CD, French DP, Longdon S, Morris K, Eves FF. Are beliefs elicited biased by question order? A theory of planned behaviour belief elicitation study about walking in the UK general population. British Journal of Health Psychology. 2007 Feb;12(Pt1): 93-110. ISSN 2044-8287 DOI: 10.1348/135910706X100458 http://dx.doi.org/10.1348/135910706X100458 3: Darker CD, French DP. What sense do people make of a theory of planned behaviour questionnaire?: a think-aloud study. Journal of Health Psychology. 2009 Oct;14(7):861-71. ISSN 1461-7277 doi: 10.1177/1359105309340983 http://dx.doi.org/10.1177/1359105309340983 4: Darker CD, French DP, Eves FF, Sniehotta FF. An intervention to promote walking amongst the general population based on an 'extended' theory of planned behaviour: a waiting list randomised controlled trial. Psychology & Health. 2010 Jan;25(1):71-88. ISSN 0887-0446 DOI: 10.1080/08870440902893716 http://dx.doi.org/10.1080/08870440902893716