This study aimed to compare the effectiveness of two approaches of acceptance and commitment therapy (ACT) and mindfulness-based cognitive therapy (MBCT) with Emotionally Focused Therapy for Couples (EFT) on improving intimacy and reducing Post-traumatic stress disorder (PTSD) caused by extramarital relations (EMR). This was a quasi-experimental research with a control group. The research population included all couples dealing with infidelity, who referred to a counseling center in Mashhad, Iran, during August-September 2018. The subjects were selected through multistage cluster sampling. Twenty - nine couples who were dealing with infidelity at the time of the research were selected and filled the PTSD scale and intimacy survey. Participants ranged in age from 18 to 45 years. Also, the mean duration of relationships was 2 years. Out of these 40 couples, 30 couples who had symptoms of PTSD and had other conditions and willingness to enter present study, were selected through purposeful sampling as the sample of present study and randomly assigned 10 couples in the CCT group (ACT and MBCT), 10 couples in the EFT group and 10 couples were placed in the control group. Of the 30 couples selected, 2 couples (1 couple from the CCT group and 1 couple from the EFT group) resigned after the evaluation session. Finally, 28 couples remained (9 couples in the EFT group and 9 couples in the CCT group and 10 couples in the control group). Besides the PTSD questionnaire, a clinical interview was used to diagnose PTSD. Data analysis was carried out using the analysis of Covariance (ANCOVA). According to the results, there was a difference between the effectiveness of CCT and EFT on improved intimacy and reduced PTSD caused by EMR. Based on the results, it can be concluded that CCT is more effective than EFT in improving intimacy and reduced PTSD caused by EMR.

这项研究旨在比较接受和承诺疗法（ACT）和基于正念的认知疗法（MBCT）与夫妻情感集中疗法（EFT）的两种方法在改善亲密关系和减少创伤后应激障碍（PTSD）方面的有效性通过婚外关系（EMR）。这是与对照组进行的准实验研究。研究人群包括处​​理不忠行为的所有夫妇，他们于2018年8月至9月在伊朗马什哈德（Mashhad）的咨询中心进行了咨询。这些受试者是通过多阶段整群抽样选择的。研究时选择了29对正在处理不忠行为的夫妇，并填写了PTSD量表和亲密关系调查。参加者的年龄从18岁到45岁不等。另外，平均恋爱时间为2年。在这40对夫妇中，通过有针对性的抽样选择了30例具有PTSD症状且有其他条件并愿意参加本研究的夫妇作为本研究的样本，并在CCT组（ACT和MBCT）中随机分配了10对夫妇， EFT组有10对，对照组有10对。在评估会议之后，在选定的30对夫妇中，有2对夫妇（来自CCT组的1对夫妇和来自EFT组的1对夫妇）辞职。最后，还剩下28对（EFT组为9对，CCT组为9对，对照组为10对）。除了PTSD问卷外，还通过临床访谈来诊断PTSD。使用协方差分析（ANCOVA）进行数据分析。根据结果​​，CCT和EFT在改善由EMR引起的亲密关系和降低PTSD方面的有效性之间存在差异。根据结果​​，可以得出结论，CCT在改善亲密关系和减少由EMR引起的PTSD方面比EFT更有效。