This research and demonstration project was undertaken to study styles and techniques of evaluation which are applicable to early childhood programming in school and public libraries, and to identify during a working conference some methods of measuring outcomes in order to improve and justify library programs for young children. The study report discusses a literature search in librarianship and the related fields of educational sociology, social work, and behavioral psychology; pre-planning for the working conference; the recruitment of participants; proceedings of the conference; and the conference follow-up. Examples of materials used in conference presentations, simulation devices, an analysis of the project, conclusions, a summary, and outcomes are provided, and appendices include a fact sheet, a revised list of staff for the conference, announcements, application and confirmation forms, a list of participants, and the agenda for the working conference. (FM)