The purpose of this study was to investigate the psychometric properties of the Covid-19 traumatic stress scale Which examines the effects of the corona virus on various aspects of Iranian life. Method: The present study was a descriptive correlational study. The statistical population included all adults in Tehran in the age range of 17 to 72 years. 461 people participated in the study through an online call. To analyze the data, Classical Test Theory and Item Response Theory were used and statistical software Spss version 26 and R software version 4.0.1 were used. Results: The results of the instrument validity study using exploratory and confirmatory factor analysis (classical theory) and multidimensional models (Item Response Theory) confirmed three factors related to the Covid-19 traumatic stress Scale. convergent and divergent validity of the instrument was also confirmed. The validity of the scale was confirmed by Cronbach's alpha method (alpha values above 0.70 for all three factors and the total score) and the retest method (high intra-class correlation between the two measurement steps) in the classical approach of the test. Based Item Response Theory, the validity of the data was assessed using the Information function and measurement error. The Information function showed that all three factors in the trait level range between 2-to 2 had the highest awareness and the least measurement error (p <0.05). Conclusion: The Covid-19 traumatic stress scale has good validity and reliability in Iranian society and can be used as a valid scientific tool to assess the effects of the Corona virus on various aspects of Iranian life.

Background: Marital life is based on effective reciprocal relations such as quality of communications with the spouse’s family. Objectives: The present study aimed to investigate the effectiveness of cognitive-behavioral group therapy on negative feelings of the women toward their husband’s family and marital conflicts. Methods: This is a quasi-experimental study with a pretest-posttest design and follow-up with a control group. The statistical population included all women referring to Rahgosha Consultation Center in the town of Tiran (due to marital conflicts) in 2018. Thirty samples were selected using a convenient sampling technique. Then, the samples were randomly divided into two groups of experimental (15 women) and control (15 women). Women’s negative feelings toward the husband’s family and marital conflicts questionnaires were used to collect data. The experimental group received seven ninety-minute sessions of cognitive-behavioral group therapy. Finally, a posttest was performed for both groups. Moreover, the follow-up stage was administered a month after the posttest on both groups. Mean and standard deviation were used to analyze the data at descriptive statistics, and MANCOVA was used at the inferential statistics level through SPSS21 software. Results: Cognitive-behavioral group therapy could effectively decrease both the women’s negative feelings toward their husband’s family and marital conflicts (P < 0.05). Conclusions: This study demonstrated that cognitive-behavioral group therapy can be applied to decrease negative feelings toward the husband’s family and to address marital conflicts.