Search (6 results, page 1 of 1)

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Abstract

Two experiments were undertaken to determine how cognitive abilities of users of information systems and specific design features that might be implemented in information technology combine to create system usabiblity. In one case, an interaction was found to combine with system characteristics in a non-uniform manner. The existence of this interaction between user characteristics and system features is interpreted as an opportunity for incorporating user-selectable options in an information retrieval system. In the other case, there was no interaction between perceptual speed and the way index terms were presented in browsable displays. This suggests that user characteristics and system features combined uniformly to create system usability. This uniformity is interpreted as indicating that information system designers have a relatively simple choice between forms of browsable displays

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Source

SIGIR'92: the 15th International Conference on Research and Development in Information Retrieval. Proceedings. Ed.: N.J. Belkin, P. Ingwersen u. A.M. Pejtersen

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Abstract

An overview of levels and approaches in the evalution of knowledge-based systems is presented. There is a need for empirical studies using objective criteria in advance of completing the technical evaluation of such systems. A methodology for this type of evaluation developed for a particular knowledge-based indexing system is presented. It is suggested that the proposed study may serve as a model for the design of any evaluation in which the results of existing intellectual procedures are compared with results achieved when these procedures are aided by use of an appropriate expert system

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Abstract

Tests the logical reasoning ability of end users of a CD-ROM index and assesses associations between different levels of this ability and aspects of retrieval performance. Users' selection of vocabulary and their selection of citations for further examination are both influenced by this ability. The designs of information systems should address the effects of logical reasoning on search behaviour. People with lower levels of logical reasoning ability may experience difficulty using systems in which user selectivity plays an important role. Other systems, such as those with ranked output, may decrease the need for users to make selections and would be easier to use for people with lower levels of logical reasoning ability

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Abstract

1 characteristic that may affect the way users interest with information systems is the way they organise their knowledge of the topic to be searched. An experiment was conducted to determine the extent and nature of this effect. Subjects who were given different advance organisers read texts and responded to questions about the topics in the texts. These questions were presented in an information retrieval context, on simulated pre-search forms. It was found that different organising structures affected responses to questions in 1 topic of the 3 that were investigated. This demonstrates a complex interaction between the topic of the search, the organising structure employed by users, and questions asked by intermediaries. Because the way users organise their knowledge has an impact on their interaction with information systems, these organising structures may be candidates for inclusion in cognitive models of users

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Theme

Verbale Doksprachen im Online-Retrieval