Purpose: Criminal thinking has been identified as a risk factor for recidivism and more recently as a responsivity factor for treatment Published research on the relationship between criminal thinking and program attrition has been limited to incarcerated samples. The present study examined the relationship between criminal thinking and program attrition in two community-based samples. Method: Study 1 utilized a day reporting center (DRC) sample, while Study 2 utilized a sober house (SH) sample. Criminal thinking was assessed with the Criminogenic Thinking Profile (CTP), a 65-item Likert-type questionnaire that yields a total score and 8 unique thinking pattern scores. Results: In both samples, attrition was associated with higher levels of criminal thinking; however, different cognitive profiles emerged for DRC and SH non-completers. The specific criminal thinking pattern most associated with attrition from the DRC reflected a lack of regard/empathy for others, while the pattern most associated with attrition from the SH indicated a desire for risk taking and thrill seeking. Conclusion: The findings are consistent with an accumulating body of research on motivation to change and treatment engagement that identifies criminal thinking as a factor that interferes with responsivity to forensic treatment programs. (C) 2012 Elsevier Ltd. All rights reserved.