Discusses three roles of textbook illustrations--to arrest the reader's attention and arouse interest, to provide explanation and clarification of complex verbal descriptions, and to aid retention of the information presented in the text. It is recommended that illustrations be designed with their specific role(s) in mind. (EAO)

Argues that factors that create a feeling of interactivity in the human situation--response time, spontaneity, lack of distractors--should be included as prime elements in the design of human/machine systems, e.g., computer assisted instruction and interactive video. A computer/videodisc learning system for cardio-pulmonary resuscitation and its…