Abstract
Abstract Searching within public information systems is one of the most complex forms of information retrieval. The use of keywords can facilitate this. The Netherlands PTT has developed an alphanumerically operated keyword search method for Viditel, the Dutch videotex system. Laboratory experiments with untrained users have shown an increase in correctly answered questions and a decrease in search time compared with one of the existing search methods, the numerically operated subject list. Some suggestions for further improvement are given. Implementation of the method in videotex systems is recommended.
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