“…The ways in which people experience and overtly react to pain have been widely examined using observational studies in laboratory and clinical settings (Keefe & Smith, 2002). Of particular interest to researchers has been the phenomenon of pain catastrophising, described as the tendency to exaggerate the threat value of pain, as well as a predisposition to respond to it with rumination and worry, which (1) has been linked to an increase in subjective pain experienced in experimental conditions (Eccleston & Crombez, 2007;Martel, Trost, & Sullivan, 2012;Sullivan, Rouse, Bishop, & Johnston, 1997) and in chronic pain populations (Sturgeon & Zautra, 2013), and (2) has been shown to influence outward pain behaviours in experimental settings (Sullivan, Adams, & Sullivan, 2004;Sullivan et al, 1997). Furthermore, research has suggested that pain catastrophising or painrelated fear is more disabling (Crombez, Vlaeyen, Heuts, & Lysens, 1999), and is more emotionally distressing (Edwards, Cahalan, Mensing, Smith, & Haythornthwaite, 2011;Sullivan, Rodgers, & Kirsch, 2001) than the pain itself.…”