This study compares the effect of an acceptance-based protocol (ACT) and a cognitive control-based (CONT) protocol on three measures of pain coping: tolerance, self-report, and believability. Specific methodological controls were employed to further isolate the role of the value of participating in a pain task, compared to previous investigations on the alteration of the function of aversive stimulation. Twenty participants were randomly assigned to one of the conditions (ACT vs. CONT), and a pre-post design was used. In the ACT condition, the protocol established a relation of coordination between the pain-related thoughts and the actions in the valued direction. In the CONT condition, the protocol established a relation of opposition between the same aspects. Results show an increase in pain tolerance and a reduction of self-reported pain at posttest for both conditions. However, ACT participants showed significantly lower believability of pain than did CONT participants. Conceptual and clinical implications are discussed. (Contains 2 tables and 1 figure.)