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Aim and Background: Irritable bowel syndrome is the most common, costly and debilitating type of disorder among functional gastrointestinal disorders. The aim of this study was to compare the effectiveness of trans-diagnostic treatment and acceptance and commitment therapy and the control group on emotion regulation and illness perception in patients with irritable bowel syndrome.
Methods and Materials: The present research was quasi-experimental and pretest-posttest with a control group. The statistical population of this study included all of the patients with irritable bowel syndrome referred to Poursina Hakim Center of Isfahan during 2019-2020. The sample researchconsisted of 45 infected patients that were selected by available sampling method. In addition, they were randomly placed in two experimental groups (15 patients in each group) and one control group (with 15 patients). Integrated trans-diagnostic intervention of Barlow (2011) was done for the first experimental group during 8 session (90min). On the other hand, acceptance and commitment therapy of Hayes (2002) was done for the second experimental group during 8 session (90min) in two months interval and the control group did not receive any intervention. From the Broadbent et al.'s illness perception questionnaire and the Garnefski & Kraaij (2006) cognitive- emotion regulation and demographic data sheet were used to collect the findings. Multivariate and univariate analysis of covariance were used to analyze the data. The software used was SPSS version 19.
Findings: The results showed that trans-diagnostic therapeutic interventions and acceptance and commitment did not have a significant effect on increasing illness perception and reducing non-adaptive strategies. Trans diagnostic treatment and acceptance and commitment had affected on increasing adaptive strategies (P <0.05).
Conclusions: Therapists can adopt effective methods by using above- mentioned interventions in order to improve the condition of patients having irritable bowel syndrome to increase the efficacy of their treatments.

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Aim and Background: The present study aimed to investigate the relationship between coping strategies and health anxiety during the covid-19 pandemic, taking into account the mediating role of health-promoting behaviors.
Methods and Materials: This research was a descriptive, correlational, and path analysis type study. The statistical population consisted of adults aged 18 years and above, of which 207 people were selected as a sample using the convenience sampling method. The data in this research was collected using Salkovskis and Warwick's (2002) health anxiety questionnaire, Walker et al.'s (1995) health-promoting behavior questionnaire, and Lazarus and Folkman's (1985) coping strategies checklist. For data analysis, SPSS-26 and LISREL 8.80 software were used.
Findings: relationship between problem-oriented and emotion-oriented coping strategies with health-promoting behaviors (P < 0.001) and a negative and significant relationship between health-promoting behaviors and health anxiety (P < 0.05). In addition, there was a negative relationship between problem-oriented coping strategies and health anxiety, and a positive relationship between emotion-oriented coping strategies and health anxiety; But it was not statistically significant (P>0.05). The results of the path analysis model showed that the initial research model was not meaningful and after removing the non-significant paths and modifying them, the final model was confirmed with the mediating role of health-promoting behaviors.
Conclusions: The results of this research showed that coping strategies play a role in health anxiety and predict it by influencing health-promoting behaviors.