Unrestricted.2016-11-142011-02-182016-11-141969-08http://hdl.handle.net/2346/8993The problem of this study v:as to obtain information on the effect of teaching conceptual information using three alternate variations of overhead transparency projectuals. The problem had tv aspects: (1) to determine which of three alternate variations of overhead transparency projectuals accomplished the most learning of conceptual information, and (2) to determine whether color or non-color (black or white) images and positive (white) or negative (black) backgrounds in transparencies most influenced the learning of conceptual information.application/pdfengTeachingAudio-visual educationTransparencies in educationDissertation