Here are references for papers from our own lab. For access to ECOS papers published by researchers in other institutions, click the Google Scholar links.
Rose, E.A., Markland, D., & Parfitt, G. (2001). The development and initial validation of the Exercise Causality Orientations Scale. Journal of Sports Sciences, 19, 445-462. abstract full text (pdf) For personal use only
Rose, E.A., Parfitt, G. & Williams, S. (2005). Exercise causality orientations, behavioural regulation for exercise and stage of change for exercise: exploring their relationships. Psychology of Sport and Exercise, 6, 399-414. abstract full text (pdf) For personal use only