Methods
This study was quasi-experimental (pretest-posttest). Research sample in this study included 67 first year nursing students studying in Mashhad School of Nursing and Midwifery in the academic year 2019–2020 who were selected by convenience sampling method. Inclusion criteria were: no clinical work experience, no participation in CPR training courses and willingness to participate in the study. Exclusion criteria were Persons who attended a training session or similar study at the same time and those who did not want to continue working from the study. In this study, the sample size was calculated (