University of Mohaghegh Ardabili A Review of Theorizing of Behavioral Sciences 3060-7027 1 4 2024 10 01 Investigating the Effectiveness of Web-Based Theory-Based Motivational Interviewing on the COVID-19 Vaccine Hesitancy among the Health Care Workers of a Military Hospital in Tehran 31 44 3738 10.22098/j9032.2025.16966.1040 EN Javad Kazemi Assistant Professor of Counseling, Faculty of Humanities, Sayyed Jamaleddin Asadabadi University, Asadabad, Hamedan, Iran Fatemeh Rahmati Associate Professor, Health Research Center, Life Style Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran Kosar Jafari Students' Research Committee, Babol University of Medical Sciences, Babol, Iran Abed Majidi Assistant Professor of Counseling, Faculty of Humanities, Sayyed Jamaleddin Asadabadi University, Asadabad, Hamedan, Iran Tahereh Kamalikhah Assistant Professor, Department of Public Health, , Kashan University of Medical Sciences, Kashan, Iran Journal Article 2024 03 20 The purpose of this study was to investigate the effectiveness of motivational interviewing on the COVID-19 Vaccine Hesitancy in Military Besat Hospital’s health workers. The research is semi-experimental, it also include a pre-test/post-test design and a control group. The study population include the health workers of Besat Hospital in Tehran in November 2021. The sample consisted of 240 workers, who were selected through convenience sampling, which were sorted into two experimental and control groups of 120 people. After the pre-test, the experimental group went through two 4-hour online motivational interviewing sessions. Then, the post-test was taken. The research tool was the self-administrated scale for the COVID-19 Vaccine Hesitancy with a content validity of 0.87 and Cronbach's alpha of 0.96. The data were analyzed in the descriptive part by extracting the mean and standard deviation and in the inferential part by  analyzing the covariance with SPSS ver. 21. Motivational interviewing significantly increases the tendency to vaccinate, which was significant at the P=0.037 level. The covariance analysis test showed that the mean scores of the health belief model factors include susceptibility (P<0.03), severity (P<0.01), perceived benefits (P<0.04), and perceived barriers (P<0.05), self-efficacy (P<0.02) and cues to action (P<0.04). After the educational intervention, there was a significant difference in the experimental group compared to the control group. Motivational interviewing can be used to increase the tendency to receive the COVID-19 vaccine. It is recommended to teach motivational interviewing in health centers to personnel involved in vaccination services. https://rtbs.uma.ac.ir/article_3738_2c455188a3b7d0fdeda1232f74cef216.pdf