This study investigates how graphical and content list type overviews with and without navigation restrictions affect the cognitive load experienced by a learner searching for information in a hypertext. The study used a 2x2 between factor design with the factors navigability (restricted vs. non-restricted) and overview format (graphical vs.…

Within the framework of cognitive learning theories, instructional design manipulations have primarily been investigated under tightly controlled laboratory conditions. We carried out two experiments, where the first experiment was conducted in a restricted system-paced setting and is therefore in line with the majority of empirical studies in the…

Educational hypertexts usually include graphical overviews, conveying the structure of the text schematically with the aim of fostering comprehension. Despite the claims about their relevance, there is currently no consensus on the impact that hypertext overviews have on the reader's comprehension. In the present paper we have explored how…

A multipoint, multimedia conferencing system called FocusShare is described that uses IPv6/IPv4 multicasting for real-time collaboration, enabling video, audio, and group awareness information to be shared. Multiple telepointers provide group awareness information and make it easy to share attention and intention. In addition to pointing with the…

Describes a study that examined the home pages of all 120 libraries in the Association of Research Libraries (ARL) to compare design similarities and differences. Highlights include background; document headers and footers; graphics; hypertext links; and unlinked text. (Author/LRW)

A review of college and university library home pages concluded that many higher education home pages are badly designed, difficult to navigate, and a poor reflection on the institution. The most common shortcoming was the tendency to create too many links or overly large graphics. An appendix lists points to consider when constructing a home…

Describes a study of undergraduates that enhanced a hypertext environment with a graphical overview that represented the basic domain structure and designed the layout so learners were unobtrusively encouraged to follow a sequence of exploration that followed the domain structure. Results indicated that a visual display conveys knowledge in its…

This quantitative study compared the instructional effects of two web-based animation strategies against static graphics by high and low prior knowledge participants. One strategy used animation to gain attention; the second to gain attention and provide elaboration. Participants were 111 college student volunteers. Two-way multiple analysis of…

As information delivery systems on the Internet increasingly evolve into World Wide Web browsers, understanding key graphical elements of the browser interface is critical to the design of effective information display and access tools. Image maps are one such element, and this document describes a pilot study that collected, reviewed, and…

Describes a study of undergraduates that compared navigational study strategies, the extent of lesson coverage, and attitudes about learning with three types of hypermedia lessons to examine how learners use different types of graphical browsers in a learner-controlled hypertext system to construct personalized representations of the content…

This paper examines the effect of applying symbolic computation and graphics to enhance students' ability to move from a visual interpretation of mathematical concepts to formal reasoning. The mathematics topics involved, Approximation and Interpolation, were taught according to their historical development, and the students tried to follow the…

Self-regulated learning with authentic and complex problems requires that learners observe their own learning and use additional information when appropriate (e.g., hypertextual information in computer-supported learning environments). Research indicates that learners in problem-based environments often have difficulties using additional…

Discussion of search behavior in electronic environments focuses on the development of GRIP (Graphic Representor of Interaction Patterns), a graphing tool based on HyperCard that produces graphic representations of search patterns. Search state spaces are explained, and forms of data available from electronic searches are described. (34…

Questionnaires, observation, and taped interviews of 36 graduate students were used to compare and evaluate the use of a continuous zooming graphical interface and a typical jump-based hypertext interface, with a focus on minimizing user disorientation when reading documents. Learning time, performance and user satisfaction were evaluated. (AEF)

This survey of authoring languages that are used in computer-assisted instruction (CAI) highlights recent developments in Macintosh authoring languages and discusses their use in courseware development. CAI effectiveness is defined, advantages and disadvantages of CAI are described, and future research needs are suggested. (27 references) (LRW)