“…For the present study, established measures of behavioural regulations and psychological need satisfaction were adapted for the domain of walking behaviour and their hypothesised factor structures were tested using Bayesian structural equation modelling (BSEM; Muthén and Asparouhov, 2012). BSEM for the assessment of factorial validity is only just beginning to appear in the sport and exercise psychology literature (Barnett et al, in press;Gucciardi & Jackson, 2015;Gucciardi, Peeling, Ducker, & Dawson, 2014;Jackson, Gucciardi, & Dimmock, 2014;Stenling, Ivarsson, Johnson, & Lindwall, in press) but is not yet widely adopted.…”