“…Although an association between controlled motivation and poorer outcome would be consistent with predictions based on Self-Determination Theory ( Ryan & Deci, 2008), no such association has been found in our study nor in the available eating-disorder literature. One explanation for the lack of effect of controlled motivation on trajectories of eatingdisorder symptoms may be that more constraining interventions (such as hospitalization or family-based therapy) have been shown to be effective (Collin, Power, Karatzias, Grierson, & Yellowlees, 2010;Le Grange, Lock, Agras, Bryson, & Jo, 2015;Lock et al, 2010;Madden et al, 2015), and may over-ride effects of controlled motivation.…”