Randomized Trial of Web-Delivered Acceptance Therapy for Smoking Cessation (WebQuit)

Inclusion Criteria: * age 18 or older * smokes at least five cigarettes daily for at least past 12 months * wants to quit in next 30 days * willing to be randomly assigned to either group * resides in US * has at least weekly access to a high speed Internet connection and email * willing and able to read in English * not participating in other smoking cessation interventions (including our other intervention studies * has never used the Smokefree.gov website * willing to complete all three follow-up surveys * provide email, phone, and mailing address * provide contact information for two collaterals (e.g., relatives). * does not have family, friends, or other household members participating Exclusion Criteria: * The exclusion criteria are the opposite of the inclusion criteria above.