Pre treatment data were collected during the two weeks prior to the start of the CBT groups. Posttreatment data were collected at the end of the final group session. Posttreatment measures were administered by members of the research team unaffiliated with the participants. Whenever possible, pretreatment measures were also administered by members of the research team unaffiliated with the participant; occasionally, the group leader administered pretreatment measures due to schedule conflicts.