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Objective: This study aimed to evaluate the effectiveness of Emotional Schema Therapy (EST) in improving relationship quality and conflict resolution styles among betrayed spouses. Methods: This study was conducted as a randomized controlled trial (RCT) with 30 participants from Tehran, Iran, who were recruited through counseling centers and online advertisements. Participants were randomly assigned to either the experimental group (15 participants), which received eight weekly 90-minute EST sessions, or the control group (15 participants), which did not receive any therapeutic intervention during the study period. Data were collected at three time points: pre-test, post-test, and five-month follow-up, using standardized measures of relationship quality and conflict resolution styles. Repeated measures analysis of variance (ANOVA) and Bonferroni post-hoc tests were used to analyze the data using SPSS version 27. Findings: The results indicated significant improvements in both relationship quality and conflict resolution styles in the experimental group compared to the control group. For relationship quality, repeated measures ANOVA revealed a significant interaction effect between time and group (F(2, 54) = 82.46, p < .001). Similarly, for conflict resolution styles, a significant interaction effect was observed (F(2, 54) = 76.92, p < .001). Bonferroni post-hoc tests showed that these improvements were sustained at the five-month follow-up. Conclusion: Emotional Schema Therapy is an effective intervention for enhancing relationship quality and conflict resolution styles in betrayed spouses. By targeting maladaptive schemas and promoting emotional regulation, EST provides a comprehensive framework for addressing relational challenges following infidelity. These findings support the integration of EST into marital therapy practices.

Objective: This study employed an aims to evaluate the effectiveness of SST in enhancing the mental health of couples. Methods: In the quantitative section of this explanatory mixed-method design, a quasi-experimental pretest-posttest design with a control group was utilized. The Mental Health Inventory-28 (MHI-28) by Basharat (2009) was employed to assess couples' mental health before and after the intervention. Data analysis was performed using SPSS22 software, and the findings indicated that SST significantly improved couples' mental health. In the qualitative section, semi-structured interviews were conducted with couples to examine their experiences with this type of therapy through descriptive phenomenology. Findings: According to the eta coefficient, SST accounted for 34% of the variance in the psychological well-being subscale and 17% in the psychological distress subscale, indicating large and medium effect sizes, respectively. The qualitative findings supported the quantitative results, highlighting positive changes such as improved emotional state, increased interest in life, a sense of calmness, feeling loved, hope for the future, and reduced stress and distress one month after the session. These changes aligned with the subscales and questions of the mental health questionnaire, serving as confirmation of the quantitative outcomes. Conclusion: Ultimately, this study emphasizes the importance of SST as an effective therapeutic tool for couples. The findings may be valuable for therapists and future researchers while encouraging clients to seek therapy.

Background: Grief is a natural and universal response to the loss of a loved one. The grief experience is not a state but a process. Most individuals recover adequately within a year after the loss; however, when individuals experience an extension of the standard grieving process, they are said to be experiencing prolonged grief disorder, thought to result from failure to transition from acute to integrated grief. Therefore, validating tools related to grief in different cultures can provide the ground for measuring its concept by the culture to understand the cultural differences of this structure. Aims: This study aimed to investigate the psychometric properties, reliability, and validity of PG-13-R. Methods: Data were collected from two independent samples of 285 (exploratory factor analysis) and 241 (confirmatory factor analysis) mourning adults to determine whether the findings explored in one sample can be verified in another. Face and content validity were measured quantitatively and qualitatively. Concurrent validity was measured using correlation coefficient calculation with the Posttraumatic Stress Disorder Checklist (PCL-5), the Generalized Anxiety Disorder scale (GAD-7), and the Beck Depression Inventory-II (BDI-II). The collected data were analyzed using SPSS.27 and AMOS.26 software. Exploratory factor analysis was performed using principal components and the Varimax method. Confirmatory factor analysis was performed using AMOS.26 software. Results: The exploratory and confirmatory factor analyses supported the two-factor structure with emergent distress, detachment, and meaninglessness factors. These factors had acceptable internal consistency. PG-13-R factors had good convergence validity with depression, anxiety, post-traumatic stress disorder, and bereavement experience (P< 0.05). Cronbach's alpha coefficient (α) was 0.78 for Distress and 0.79 for Detachment and Meaning factor, and 0.87 for the whole scale, indicating good internal consistency Conclusion: PG-13-R is a useful and reliable tool for measuring PGD symptoms in the Iranian population. It is suggested that future studies examine this scale in people who have been bereaved for various reasons, including (death by suicide, sudden death, and death by accident).