Résumé : The usefulness of psychological training programs (P.T.P.) in health care settings devoted to cancer care is beginning to be recognised but their content, form and effectiveness need further investigation. Seventy-two oncology nurses were randomly assigned to a 24-h P.T.P. or to a waiting list period. Attitudes were assessed by a semantic differential questionnaire, occupational stress was assessed by the Nursing Stress Scale and communication skills were assessed by standardised videotaped role-playing exercises. These were used to compare trained (T.S.) and control subjects (C.S.). The results show a significant training effect on attitudes (P = 0.05), especially on those related to self concept (P = 0.004), and on the level of occupational stress related to inadequate preparation (P = 0.02). Limited changes were found regarding post-training communication skills. T.S. were significantly more in control of the interview than C.S. (P = 0.02). The results indicate that 24-h P.T.P. assessed here are effective. The data also demonstrate the need to consolidate the skills acquired by regular posttraining sessions.