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Experimental and Quasi-Experimental Designs for Research in Information Science.
Peer reviewed Peer reviewed
Haas, David F.; Kraft, Donald H. – Information Processing and Management, 1984
This paper examines representative research in information science and compares its designs to an abstract ideal of the experimental research design. Threats to validity of conclusions are highlighted, including history, maturation, testing, instrumentation, statistical regression, selection biases, experimental mortality, and selection-maturation…
Descriptors: Information Science, Models, Research Design, Research Methodology
Sign Detection Theory and Its Applications.
Peer reviewed Peer reviewed
Heine, M. H. – Information Processing and Management, 1984
Offers characterization of sign-transmission which is more general than conventional signal-transmission theory. Concepts and terminology, formal description of individual communications process, reconciliation with classical signal-detection theory, applications of sign-detection formalism to information retrieval on MEDLINE database, and a…
Descriptors: Algorithms, Cognitive Processes, Communication (Thought Transfer), Information Retrieval
Hypermedia and Free Text Retrieval.
Peer reviewed Peer reviewed
Dunlop, Mark D.; van Rijsbergen, C. J. – Information Processing and Management, 1993
Discusses access to nontextual documents in large multimedia document bases. A hybrid information retrieval model, using queries in a hypertext environment for location of browsing areas, is presented; and two experiments using cluster-based descriptions of content are reported. (23 references) (EA)
Descriptors: Computer System Design, Graphs, Hypermedia, Indexing
Querying a Hypertext Information Retrieval System by the Use of Classification.
Peer reviewed Peer reviewed
Aboud, M.; And Others – Information Processing and Management, 1993
Presents an information systems navigation approach using a combination of functionalities encountered in classification processes, Hypertext systems, and information retrieval systems. The first version of the SYRIUS system is described, with emphasis on the user's graphic interface which integrates these functionalities. (26 references) (EA)
Descriptors: Classification, Computer Graphics, Computer System Design, Hypermedia