Document (#10829)

Author
Chan, H.C.
Wei, K.K.
Siau, K.L.
Title
¬An empirical study on end-users' update performance for different abstraction levels
Source
International journal of human-computer studies. 41(1994) no.3, S.309-328
Year
1994
Abstract
A major database task is update, for which performance has not been measured. With the widespread availability of databases, updates will be done frequently by end users. The task is gaining in importance as a measure of the usabiblity of a database system. An experiment was conducted to measure the effect of different abstraction levels on user performance for updates. A conceptual level group used the entity relationship model with an entity relationship query language KQL, while a logical level group used the relational model with the standard relational language SQL. Performance was primarily measured by the accuracy of the update query. Secondary measures of time and confidence were also taken

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  5. Omiecienski, E.: ¬An analytical comparison of two secondary indexing schemes : physical versus logical addresses (1993) 0.21
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