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- W2011302664 abstract "The aim of the study was to investigate the relationship between mental models required by a database system, clues provided by the system to these models, and users' behaviour in operating the system. For this purpose a fulltext database system containing news articles about telecommunication and information technology was used. Ten non professional computer users participated in the study. The subjects' tasks were to retrieve and display certain articles and pieces of articles on the screen. By analysing knowledge needed to carry out these tasks, the required mental models could be identified. Then, through analysing the specific system clues to the required mental models, difficulties subjects would run into were predicted. The fulltext database system employed for the study operated on three different levels of display. That is, it operated as if it had three different modes, each level corresponding to a different mode. The clarity of clues to adequate mental models differed on the three levels. Most salient were clues concerning the order in which articles and pieces of articles were presented. These clues were least clear on the second level of display. As predicted this was also the level of display on which subjects' performance was worst (p<0·05). Among difficulties identified in subjects' think-aloud protocols, difficulties with the numbering system (“record numbers”) were the most frequent on the second level. In contrast, clues concerning the order of articles were relatively clear on the first level of display. As predicted subjects performed well on this level with 90% correct responses. The central role of appropriate clues to adequate mental models is further illustrated by examples of subjects' mental model reasoning. In these examples three different phases of mental models are shown to exist—a construction, a testing, and a running phase." @default.
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- W2011302664 title "System demands on mental models for a fulltext database" @default.
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- W2011302664 doi "https://doi.org/10.1016/s0020-7373(05)80031-8" @default.
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