Three sets of audiovisual lessons were presented on either a prototype videodisc player or with film/audiocassette. Both groups of trained soldiers performed significantly better than a control group. On two of the lessons, no difference was found between presentation modes--the third favored film/audiocassette. (Author/JEG)

This field study examined learning effects attributable to instructional design characteristics when eighth-grade science students used a print encyclopedia or a videotex version of the encyclopedia to write term papers. Results suggest that specific effects of instructional design characteristics of a delivery system are of a limited nature. (MBR)

Describes study designed to evaluate the effectiveness of interactive videodisc program Mastering Fractions. The videodisc program is compared with traditional fractions curriculum and teaching methods in sixth grade classes; pretests, posttests, and mastery tests used are discussed; and results of the study are analyzed. (LRW)