A graphical filter/flow representation of Boolean queries: A prototype implementation and evaluation

Degi Young and Ben Shneiderman

Journal of the American Society for Information Science, 1993, vol. 44, issue 6, 327-339

Abstract: One of the powerful applications of Boolean expression is to allow users to extract relevant information from a database. Unfortunately, previous research has shown that users have difficulty specifying Boolean queries. In an attempt to overcome this limitation, a graphical Filter/Flow representation of Boolean queries was designed to provide users with an interface that visually conveys the meaning of the Boolean operators (AND, OR, and NOT). This was accomplished by implementing a graphical interface prototype that uses the metaphor of water flowing through filters. Twenty subjects having no experience with Boolean logic participated in an experiment comparing the Boolean operations represented in the Filter/Flow interface with a text‐only SQL interface. The subjects independently performed five comprehension tasks and five composition tasks in each of the interfaces. A significant difference (p

Date: 1993
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