Catastrophizing cognitions, consisting of rumination, helplessness, and magnification, are associated with increased pain intensity and pain behaviors in individuals with chronic pain. Trait-like catastrophizing refers to levels of catastrophizing related to general past pain experiences. In-vivo catastrophizing refers to levels of catastrophizing related to a specific pain event, usually one that has just occurred. The current study examined the extent to which trait-like and in-vivo pain catastrophizing are differentially related to experimental pain tolerance. We hypothesized that: 1) In-vivo catastrophizing would have a stronger relationship with pain tolerance than trait-like catastrophizing. 2) Different components of catastrophizing (i.e. rumination, helplessness, and magnification) would be differentially related to pain tolerance.This study was supported by the Department of Psychology Research Award