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Aim and Background: Recently, “Third wave” behavioral and cognitive interventions have received extensive attention between researchers.To evaluation of the efficacy of one of these treatments, Acceptance and Commitment Therapy (ACT), This Study compares this treatment with Cognitive - Behavioral Therapy (CBT) in Obsessive- Compulsive Disorder (OCD).   methods and Materials: In this study a quasi- experimental design with pre - posttest was used. Implementation of this study was from February 2011 to October 2012 in the Parse`s center of Psychiatry and Psychology.The experimental groups were Acceptance and Commitment Therapy (n =13) and Cognitive-Behavior Therapy (n =13). Both groups received 10 two-hour treatment sessions once a week. In control group 12 patients participated (wait list). In order to assess the severity of OCD, psychological flexibility and depression, Yale Brown Obsessive- compulsive scale (YBOCS), Acceptance and Action Questionnaire (AAQ) and Beck Depression Inventory (BDI) were used. Data were analyzed using Multiple Analysis of Covariance in SPSS. Finding: Comparison of the treatment groups suggested that there was significant difference between ACT and wait list groups in all scales and this difference maintains in follow up (P=0.01). In addition, comparison of CBT group with wait list in posttest indicates that there was signifficant difference between two groups, except of psychological flexibility variabele, and these results maintain in follow up too (P=0.01). In post test, two groups show significant difference only in Acceptance and Action Questionnaire (P= 0.05) not in reduction of OCD symptoms and depression. ACT was more effective in increase of psychological flexibility and this superiority maintains in follow up (P= 0.01). Conclusions: Based on the results of this study, both Acceptance and Commitment Therapy and Cognitive-Behavior Therapy, made significant changes in OCD symptoms. So, current study provides an empirical support for Acceptance and Commitment Therapy in treatment of OCD.

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Aim and Background: Experiential avoidance is a behavior pattern that increases binge eating among overweight and obese individuals. The objective of this study was to investigate the efficacy of acceptance and commitment therapy (ACT) on experiential avoidance among overweight and obese individuals in Isfahan, Iran. Methods and Materials: The present quasi-experimental research was conducted with a pretest-posttest, double-blind, and multicenter design with control group. The statistical population of the study consisted of all overweight and obese individuals a body mass index (BMI) of more than 25 referring to nutrition and diet therapy clinics in the winter of 2015. From among them, 40 individuals were selected through convenience sampling based on the study criteria and were randomly assigned to the experimental and control groups (each group = 20 individuals). Both groups completed the Acceptance and Action Questionnaire for Weight-Related Difficulties (AAQW) designed by Lillis and Hayes, at pretest, posttest, and follow-up stages (45 days after the intervention). The reliability of the AAQW was calculated using Cronbach&#039;s alpha coefficient (&alpha; = 0.91) and its content validity was confirmed by experts. The experimental group received 8 60-minute sessions of ACT. The control group, however, received no intervention. Data were analyzed using ANCOVA in SPSS software. Findings: There was a significant decrease in experiential avoidance among the experimental group participants (P < 0.05). Moreover, this effect was maintained until the follow-up stage. Conclusions: According to the results, ACT can be considered as an efficient intervention for the reduction of experiential avoidance in overweight and obese individuals. The reduction in experiential avoidance results in the increasing of psychological flexibility in these individuals. Therefore, ACT can be used in conjunction with other weight control interventions.

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Aim and Background: Suicide as one of the leading causes of death worldwide is a major public health concern; however, few studies have examined the factors influencing it in families on the verge of divorce. To determine the prediction of tendency to suicide based on the difficulty of emotional regulation, cognitive flexibility, family flexibility, and distress tolerance in adolescents and young families on the eve of divorce in Isfahan.
Methods and Materials: The present study was a descriptive correlation that was performed in the statistical population of all adolescents and young families on the eve of divorce in Isfahan in the second six months of 2019-2020. According to the Cochran's formula, 373 people were selected and answered Beck scale for suicide ideation, difficulties in emotion regulation scale, cognitive flexibility inventory, family flexibility questionnaire and distress tolerance scale. Data collected by Pearson correlation coefficient and stepwise regression were analyzed using SPSS-24 software.
Findings: The research findings showed that difficulty in emotion regulation a positive and significant relationship with the tendency to suicide. Cognitive flexibility, family flexibility and distress tolerance have a negative and significant relationship with tendency to suicide (P<0/01). Data from stepwise regression analysis also showed that cognitive flexibility and difficulty in emotion regulation have a combined ability to predict 17% of variance changes in tendency to suicide (P<0/01).
Conclusions: The results of the present study showed that difficulty in emotion regulation and cognitive flexibility play an important role in the tendency to suicide in adolescents and young families on the eve of divorce.

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Aim and Background: In addition to inflicting distress and functional impairment, the Cyberchondria phenomenon could cause a heavy burden to healthcare professionals by increasing in number of visitors to hospitals and medical centers. Cyberchondria can be helpful in choosing and designing psychological interventions. Therefore, this study aimed to explore relationships between two components of psychological flexibility (Mindfulness and Cognitive diffusion) to Cyberchondria and the possible moderator effect of COVID-19 Anxiety in this relationship.
Methods and Materials: The method used in this study was descriptive and correlational. The statistical population included all students who were studying at Shiraz University in the academic year 2021-2022. Convenience Sampling was used to choose participants. Data gathering was done on the Internet because of social distancing obligations. 262 participants completed study questionnaires. The tools used in this research were the Cyberchondria severity scale (CSS), Freiburg Mindfulness Inventory (FMI), Cognitive Fusion Questionnaire, and Corona Disease Anxiety Scale (CDAS). The structural equation modeling method and Lisrel software were used to explore the relationship between study variables.
Findings: The presented model has a good fit. No significant relationship was found between mindfulness and cyberchondria. Cognitive Diffusion also had direct and indirect (through COVID-19 Anxiety) effects on Cyberchondria. Therefore, a significant statistical relationship was confirmed between study variables.
Conclusions: In sum, it seems cognitive defusion significantly contributes to cyberchondria symptoms, and COVID-19, as a mediant variable, plays a significant part in individuals' vulnerability against cyberchondria. 

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Aim and Background: The present study aimed to predict the quality of life based on the perception of suffering, meaning of life, social support, and psychological flexibility in irritable bowel syndrome patients and by a correlational descriptive method.
Methods and Materials: The study's statistical population comprised 140 patients with irritable bowel syndrome in Isfahan in 2022-2023. To collect information from the quality of life questionnaires of Patrick and Drasman (IBS-QOL), the experience and perception scale of Scholz et al, the meaning in life questionnaire of Steger, Fraser, Avishi and Kaler, the acceptance and action questionnaire of the 2nd edition and colleagues and the background of the study of the medical consequences of social support (Sherborn and Stewart) were used.
Findings: The results showed that among the variables studied in the regression, the best predictor of quality of life was social support in the first step, the meaning of life in the second step, and the perception of suffering in the third step. Accordingly, in the first step, the coefficient of social support accounted for 52.6% of the variance of the quality of life, in the second step, the coefficients of social support and meaning of life accounted for 55.6% of the variance of the quality of life, and in the third step, the coefficients of social support, the meaning of life, and the perception of suffering accounted for 57/2%.
Conclusions: Considering the significant role of the perception of suffering, the meaning of life, social support, and psychological flexibility in predicting the quality of life, a comprehensive care program for irritable bowel syndrome patients is proposed by developing and increasing the above variables to improve their quality of life.