The purpose of this thesis was to conduct an in-service training program for the staff members of a nursing care facility for the elderly and evaluate the benefits of the program in terms of knowledge gained in the areas of presbycusis and hearing aids following the presentation dealing with these topics. Twenty-five staff members consisting of nurses' aides and licensed personnel (RN and LPN) at Westminster Village Health Center in Muncie, Indiana, a nursing and retirement facility for the aged, were given a presentation dealing with hearing problems and hearing aids for the elderly. Questionnaires of subjective ratings of competency with hearing aids and a test of knowledge of hearing problems and hearing aids were administered to the staff members before and after the presentation in order to evaluate any change in these factors following the presentation.Post versus pre-test results for both the questionnaire and the test showed significant improvement at the .0005 level. Suggestions for future in-service programs were also included.