Effective message design for screen-based computer or video instructional programs requires knowledge from many disciplines. Evaluates current conventions and suggests a new set of guidelines for screen-based designers. Discusses screen layout, highlighting and cueing, text font and style, text positioning, color, and graphical user interfaces for…

Describes a study of undergraduates that enhanced a hypertext environment with a graphical overview that represented the basic domain structure and designed the layout so learners were unobtrusively encouraged to follow a sequence of exploration that followed the domain structure. Results indicated that a visual display conveys knowledge in its…

Investigated the effects of presentation format (animation, still graphics, text) and the students' prior knowledge on learning a computer-based physics lesson in grades eight and nine. Results of an analysis of covariance indicated that specific presentation formats are not equally effective for the different prior knowledge groups. (Author/LRW)