Leili Nourian - MSc, Department of Educational Science and Psychology, Isfahan (Khorasgan) Branch, Islamic Azad University, Isfahan, Iran.
Asghar Aghaei - Professor (PHD), Department of Educational Science and Psychology, Isfahan (Khorasgan) Branch, Islamic Azad University, Isfahan, Iran

Objective: The aim of this study was performed to determine the effectiveness of acceptance and commitment therapy on psychological flexibility in obese women in Isfahan, Iran. Materials and Methods: This was a quasi-experimental pre-test, post-test trial with follow-up. The study population was all of the obese women in Isfahan in ۲۰۱۴ (BMI≥۳۰).the sample of study was selected by convenience sampling method. They were randomly assigned to two experimental and control groups (۱۵ per group). The Acceptance and Action Questionnaire for Weight-Related Difficulties (Lillis & Hayes, ۲۰۰۸) was the study instrument. The intervention was ۸ sessions of ۹۰ minutes. Acceptance and commitment therapy was provided only to the experimental group. Data was analyzed by SPSS. Results: Results of covariance analysis showed a significant increase in psychological flexibility at post-test and follow-up stage (P<۰.۰۵). Conclusion: Our findings showed that acceptance and commitment therapy has been effective on psychological flexibilityof obese women.

Acceptance and Commitment Therapy, Psychological flexibility, Obese women