Discussion of hypertext structures focuses on three studies of preservice teachers that assessed the effects of different methods of explicitly mapping expert knowledge structures onto hypertext on the acquisition of structural knowledge. Topics addressed include time on task, semantic networking, cognitive limitations of browsing behavior, and…

Discusses integrated learning systems (ILSs) and describes a study that considered the degree of linear relationship between time spent on the ILS and outcome achievement on ninth-grade algebra students. The effects of previous math and verbal achievement and sex differences are explored, and measurement instruments are described. (Contains 14…

Explains the combination of hypertext and knowledge maps into hypermaps, and describes a study of undergraduates learning statistical material that compared the effectiveness of using hypertext versus hypermaps. Recall, reference time and accuracy, and student satisfaction are investigated, and needs for further studies are suggested. (10…

Describes study of undergraduates that investigated learners' preconceptions of the difficulty of interactive video, instructional television, and television. The effects of actively or covertly responding to practice questions on perceived mental effort, recall, and inferences are examined, and correlations between lesson time and inference or…

Describes a study of undergraduate students that investigated the effects of two types of learner control and two types of incentives--task-contingent and performance-contingent--on learners' achievement, attitudes, use of options, and time on program using computer-delivered instruction. Implications for instructional design and research are…