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PubMed · 10107828

Developing hypermedia systems: avoiding hyperchaos.

Abstract

Hypermedia systems allow storage of huge collections of information from a wide variety of sources and afford immediate and random access to the collections. While providing unprecedented possibilities for storing and disseminating information, hypermedia systems have the potential to confuse the developer and the user alike with a multitude of intricacies. When hypermedia are being used in the teaching/learning process, they can cause cognitive overload and disorientation, if not designed properly. One way to resolve these problems is to develop system and content flowcharts. Although developing system and content flowcharts seems to be time-consuming work, it saves time and energy over the long run. Furthermore, it promotes efficiency.

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BibTeXRIS

J S Hahn. Developing hypermedia systems: avoiding hyperchaos.. https://doi.org/10.1097/00004669-199009000-00010

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Evaluation of computer aided learning in developing clinical decision-making skills.

AIM: The aim of this study was to determine whether an educational intervention delivered by a computer aided learning package improved the sensitivity and specificity of dentists' restorative treatment decisions. METHOD: The study was a randomised controlled study using a Solomon three-group design. Ninety-five dentists were randomly allocated to the three study groups. One group of dentists read the radiographs pre and post an educational intervention, a second group read the radiographs once, after the intervention, and a third group read the radiographs twice, but received no intervention. On each occasion the dentists read 24 surfaces on each of 15 radiographs and made 360 decisions on how certain they were about restoring the tooth surface. Comparisons of mean sensitivity, specificity and areas under ROC curves were made within and between the study groups. Kappa values were used to assess changes in the level of agreement between dentists. RESULTS: There were no significant changes in sensitivity, specificity or area under ROC curves caused by the intervention. There was no evidence that the level of agreement between the dentists improved after the intervention. CONCLUSION: A computer aided learning package had no effect on dentists' treatment decision-making behaviour.

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