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Abstract

Hypertext provides a flexible environment in which to explore information. This makes it suitable for use with instructional software where students can exchange a linear progression for a more individualised exploration of the material. When designing instructional hypertext prgrammes, decisions must be taken on the degree of learner control rather than programme control. Learner control gives to the individual learner a control over the learning strategy; programme control imposes upon the learner, to some degree at least, that strategy. Discusses the arguments for and against learner control of hypertext environments in an instructional context and reviews the research evidence on learner control

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Abstract

Techniques to aid the manipulation of a computer based document were tested by a group of 38 novice users. The subjects were given a period of time to browse the document, and were subsequently given a set of goal related tasks in a questionnaire/answer session. The techniques tested were sequential paging, index referral, text fins and embedded hypertext links. 3 differing types of link mechansms were assessed and compared with each other. Sequential paging and index referral were the most commonly used of the techniques. Text find was employed more for goal related tasks than for browsing. The hypertext link technique was generally unpopular, especially for goal related tasks. In order to establish the importance of the text find technique, the effect on reading strategies without this facility was also investigated. For browsing operations, an increase in paging and decrease in hypertext linking was observed. In the case of goal directed searching, an increase was observed in paging and index referral techniques. The study calls into question the usefulness of hypertext in educational software