This study explored the enhancement of comprehension of expository text by three specific types of embedded explication--etymological, causal, and analogical--together with momentum effects from sequencing. Four factors were examined: (1) the experimental effects of presenting the section of the script containing explications of new terms before…

Describes a study of undergraduates studying genetics that compared the effectiveness of a computer simulation used before and after formal instruction. Treatment of the experimental and control groups is explained, and results are reported which support the theory that the effectiveness of the simulation is dependent on the sequence of…

Discusses research on learner control, pacing, and sequence, and describes a study of undergraduates that was conducted to determine the effects of learner versus program control of pacing and sequence in an interactive video lesson on photography. Results are analyzed, and suggestions for further research are given. (38 references) (LRW)