This extensive revision of a 1975 publication, "Guidelines for the Evaluation of Training Courses, Workshops, and Seminars in Scientific and Technical Information and Documentation," suggests possible approaches to the evaluation of the type of training sessions that might be organized or promoted by Unesco. Guidelines relate to what data to collect and how, in general, they may be collected; the focus is on adult education and, in particular, on the continuing professional education of adults and on evaluation of program effectiveness, though some attention is given to cost effectiveness or cost benefit aspects. The introduction provides definitions and discusses levels of evaluation, approaches to evaluation, and evaluation data. Additional chapters examine reaction (student reaction, independent observers, and reaction of instructors), and evaluation of learning, behavioral change, program results, specific educational activities, and cost effectiveness. In addition, suggestions are offered for designing evaluation instruments and reporting, reliability and related concerns are addressed, and conclusions provide additional comments on evaluation objectives and methods. A 76-item reference list is included and examples of data collection instruments and evaluation reports are appended. (LMM)