Marchionini, G.; Liebscher, P.: Performance in electronic encyclopedias : implications for adaptive systems (1991)
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- Abstract
- To make their system quickly usable, designers often build interfaces that reflect well-known manual activities. Demonstrates how undergraduates use their mental models for print encyclopedias to develop minimal proficiency with various electronic encyclopedias. Lower performance levels in the electronic systems are due to additional cognitive load required to adapt and develop mental models for the new systems. For the fact retrieval questions used in these relativley small data bases, the hypertext encyclopedia required less cognitive load than the 2 traditional Boolean-based systems. Adaptive designs that provide multiple system images are encouraged to support more comprehensive user understanding and more varied tasks
- Source
- ASIS'91: systems understanding people. Proc. of the 54th Annual Meeting of the ASIS, vol.28, Washington, DC, 27.-31.10.1991. Ed.: J.-M. Griffiths
Liebscher, P.; Marchionini, G.: Browse and analytical search strategies in a full-text CD-ROM encyclopedia (1988)
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- Abstract
- School library media specialists do not know which search strategies are most appropriate for the new full-text CD-ROM databases. Reports an experiment conducted to examine the effectiveness of 2 search strategies - analytical and browse strategies - for information seeking and use among high school students using an electronic full-text ancyclopedia for the search task. The experiment sought to determine whether: a short training session in a particular information strategy allows an information seeker to form an adequate mental model of the search task; and a simple 'browse' model compare favourably with a more 'analytical' model for information seeking in a full-text online environment. Both strategies proved effective for finding relevant information yet each demonstrated distinct advantages and disadvantages. Recommends that as new technologies are introduced, school library media specialists should conduct careful observations and controlled comparisons of how students use these systems
