Setting and participants
All nurses of Baqiyatallah Hospital in Tehran, Iran, were eligible to participate in the study if they met all the inclusion criteria. The study inclusion criteria for nurses included having bachelor’s or higher degrees in nursing, having at least 1 year of work experience in direct participation in patient care. Based on inclusion criteria, 270 nurses were selected by census method in 2015, and the levels of moral reasoning, moral distress, and moral sensitivity of these nurses were determined by questionnaires. Out of 270 questionnaires which distributed among participants, 25 questionnaires were excluded due to incompleteness. Therefore, the final sample size was 245 nurses with 90.7% response rate. According to our findings, in 86 nurses the mean moral reasoning score was lower than the community average. Among 86 nurses, 66 nurses who willingness to participate in the study if they did not have a history of attending in workshops or nursing ethic courses in the past, were selected by simple random sampling method and assigned into three groups (two experimental groups and one control group) using block randomization methods.