“…Self-effi cacy refers to a person's confi dence in being able to perform an action or behaviour or to alter thoughts (Bandura, 1977(Bandura, , 1997. The importance of self-effi cacy in facilitating adjustment and coping in adults with chronic disease, such as COPD, is well documented in the literature (Scherer and Shimmel, 1996;Woodard and Berry, 2001;McCathie et al, 2002;Marks et al, 2005). Therefore, an important outcome of occupational therapy for adults with COPD is to change patients' self-effi cacy regarding managing dyspnoea and other symptoms (Guyatt et al, 1999).…”