Summarizes the results of five studies dealing with screen design for computer-based instruction (CBI) and provides suggestions for their application as well as future directions for research. Chunking, text density, and screen density are discussed as variables in screen design, and current research is described. (33 references) (LRW)

Describes a study that examined the relationship between academic ability or aptitude, as measured by grade point average and American College Test scores, and achievement with and without computer-assisted instruction. (15 references) (CLB)

Addresses the implicit assumption that instructional media represent meaningful experimental variables independent of instructional content or strategy. Results of computer-based instruction (CBI) studies (both well-designed and flawed) and meta-analyses are reviewed to support the authors' position that this assumption is invalid, and new…

Criticizes the statistical methods used in a previously published article that compared a commercially produced computer program with traditional teaching methods. Measures of instructional effectiveness are described, the assignment of student pairs is examined, and the use of blocking variables with analysis of variance is discussed. (LRW)