Mohammad Tahan - Department of Psychology and Education of Exceptional Children, University of Tehran, Tehran, Iran
Hashem Sabriyan - Research Center for Cognitive & Behavioral Sciences in Police, Directorate of Health, Rescue & Treatment, Police Headquarter, Tehran, Iran

Objectives: The present study aimed to compare the effectiveness of acceptance and commitment therapy and hope therapy based on a positive psychology approach in psychological well-being and improvement of mental health among medical staff during the Covid۱-۱۹ pandemic. Methods: This quasi-experimental study was conducted based on a pre-test post-test control group design. In this research, the statistical population included all the medical staff (nurses and doctors) of Valiasr (A.S.) and Samen Ala'mh hospitals during the Covid-۱۹ pandemic, and ۹۰ subjects were selected from each hospital via available sampling. They were assigned randomly to four groups, two experimental groups and two control groups (n=۳۰ in each group). The first experimental group (ACT) received ۸ sessions (one session per week for ۱۲۰ min), and the second experimental group received ۱۰ sessions of hope therapy based on positive psychology based on Seligman's treatment protocol, ۲۰۱۱) (one session every week for ۹۰ min).  The tools used in this research were psychological well-being and general health questionnaires. The information obtained in the pre-test and post-test phases were analyzed in SPSS software (version ۲۵) using covariance analysis Results: The results pointed out that the therapy of acceptance and commitment and hope therapy based on a positive psychology approach was effective in psychological well-being and improvement of mental health of the medical staff in Valiasr (a.s.) and Saman Al-Aimeh (a.s.) hospitals during the Covid-۱۹ pandemic (P<۰.۰۱). Conclusion: As evidenced by the results of this study, the mental health and psychological well-being of the medical staff can be improved by new psychological solutions. These treatments are effective to a large extent in improving employees' individual and social performance.

Acceptance and commitment, Covid-۱۹, Mental health, Psychological well-being, Therapeutic hope