The purpose of this study was to examine the efficacy of transdiagnostic treatment on anxiety sensitivity, thought fusion, and reduction of symptoms in people with obsessive-compulsive disorder.

The study design was semi-experimental and it was implemented through the pretest-posttest along with a control group. In this study, the voluntary sampling method was applied. Therefore, among the statistical population of the study, 30 women that all of them with obsessive-compulsive disorder who settled in Isfahan province in 2020 were randomly assigned to the experimental and control groups according to inclusion and exclusion criteria derived from the study and clinical interview. The instruments applied in the current study encompassed the Yale-brown Obsessive Scale, the Anxiety Sensitivity Scale, and the Thought Fusion Questionnaire. After implementing the pretest, the participants in the experimental group were exposed to transdiagnostic treatment training collaboratively during 10 sessions for 60 minutes. Eventually, after implementing the post-test, the data were analyzed by using an analysis of covariance.

The results obtained from data analysis demonstrated that transdiagnostic treatment has paved the way for reducing anxiety sensitivity, thought fusion, and symptoms of the people with obsessive-compulsive disorder in the experimental group and in the post-test phase, and at last these changes are statistically significant. Consequently, this method can be used as an interventional and therapeutic method in order to reduce the symptoms of anxiety sensitivity, thought fusion, and symptoms of people with obsessive-compulsive disorder.

This study performed to Comparison of Perfectionism, Parenting styles and Quality of Life in Women with Obsessive-Compulsive Disorder and Healthy women. The design of the study is descriptive-causal comparative. The statistical population included all women with obsessive-compulsive disorder in Tehran's 5th, 11th, 13th and 19th districts in 1397. In this study, 44 patients referring to counseling and psychiatric clinics were selected using a clinical interview and Maudsley Obsessive- Complsive Inventory in- Access convenient . Also, 40 normal individuals who were matched in terms of demographic characteristics with obsessive compulsive group were selected using available sampling method. The subjects of the two groups responded to the Maudsley Obsessive- Complsive Inventory, baumarind parenting styles Scale, Hill’s perfectionism inventory and Quality of Life Questionnaire. Data analysis was performed using multivariate analysis of variance (MANOVA) in SPSS-18. The results showed that there was a significant difference between the two groups in perfectionism and quality of life (P<0.05). However, there was no meaningful difference between parenting styles in two groups (P<0.05). The results of this study point to the importance of perfectionism and quality of life in diagnosing and designing a treatment pattern for obsessive-compulsive disorder.

The aim of this study was to study the efficacy of integrated exposure and response Prevention and acceptance and commitment-based therapy (ACT + ERP) in reducing obsessive-compulsive symptoms in patients with obsessive-compulsive disorder. The study population consisted of all male patients with obsessive-compulsive disorder who were referred to the clinic of Shafa Hospital in Rasht in 1400 and based on a Structured Clinical Interview for Disorders- I axis  (SCID-I), they received a diagnosis of obsessive-compulsive disorder, of which 3 were selected by purposeful sampling. Yale-Brown obsessive-compulsive scale (Y-BOCS) was used to measure the intensity of the obsession and the Beck Anxiety Inventory (BAI) and Beck Depression Inventory-II (BDI-2) were used to evaluate anxiety and depression, respectively. Chart analysis, percentage of recovery, and reliable change index have been used to analyze the data. The results showed that the severity of the obsessive-compulsive disorder, depression, and anxiety of patients decreased significantly (statistically and clinically) due to the use of an integrated exposure and response Prevention and acceptance and commitment-based therapy (ACT+ERP). Therefore, the Acceptance and Commitment Therapy integrated exposure and response prevention (ACT+ERP) can be used to reduce obsessive-compulsive symptoms in patients with obsessive-compulsive disorder.

The aim of this study investigated the effect of childhood trauma on the symptoms of obsessive-compulsive disorder with a mediating role of self-regulation in patients with obsessive-compulsive disorder. In this descriptive correlational study, 300 patients with obsessive-compulsive disorder (161 females and 139 males) referred to public and private psychiatric clinics in Kermanshah according to the inclusion and exclusion criteria and receiving a diagnosis Obsessive-compulsive disorder was selected by a psychiatrist based on structured clinical interview (DSM-5) randomly according to the number of their medical records. The instruments used in this study included Structured Clinical Interview (SCID-V), Revised Obsessive-Compulsive Disorder Questionnaire by Foua et al. (2002) and the short form of Bernstein et al.'s (2003) Child Trauma Questionnaire. Data were analyzed by structural equation analysis in SPSS-21 and AMOS-24 software. The findings showed that the proposed model has a good fit with the data. In this model, the significant and direct effect of each of the variables of childhood trauma (0.405) and self-regulation (-0.163) on obsessive-compulsive disorder and also the indirect and significant effect of childhood trauma on obsessive-compulsive disorder (0.712) 0) was shown with the mentioned values (all P s <0.001).