Because previous investigations show that mistreatment during residency is frequent we undertook this research to assess the prevalence of psychological abuse, physical violence and sexual harassment in residency training programs and the professional status of perpetrators. Through a literature review and a previous qualitative study we developed a self-administered questionnaire. Thirteen events that could be experienced by residents and ten possible perpetrators were described in the questionnaire. Residents were asked to record whether they had experienced these events, at least once, and who was responsible. This survey was distribuided among the residents from three hospitals of Buenos Aires city. A total of 322 residents answered the questionnaire (55