Discusses deductive databases and database management systems (DBMS) and introduces a framework for advanced query formulation for end users. Recursive processing is described, a sample extensional database is presented, query types are explained, and criteria for advanced query formulation from the end user's viewpoint are examined. (31…

Discusses end-user searching in Boolean information retrieval systems considers the role of search intermediaries and proposes a model of user preferences that incorporates a user's profile. Highlights include document representation; information queries; document output ranking; calculating user profiles; and selecting documents for a local…

Describes a general framework for the evaluation of sets of links for user navigation between images in pictorial data banks and gives an example of the construction of a connection graph in a large image bank. A study of user navigation behavior in this set of links is described and the results are discussed. (18 references) (LAE)

Explains a new methodology for thesaurus design that is specifically geared for use by novice end-users, and describes a faceted hierarchical thesaurus organization which provides an economical information retrieval system in a corporate setting. (Author/LRW)

Proposes a conceptual reference architecture for information retrieval systems and discusses functional capabilities of a hypertext environment, based on the proposed architecture, for interaction with large textual databases. Functions of the prototype system HYPERLINE are described, and an example of a user session is provided. (17 references)…

Reviews and expands on a 1985 study that described a detailed evaluation of the effectiveness of an operational full-text information retrieval system, STAIRS, which was used by IBM for litigation support. Problems the user faces are described, and recall/precision studies are discussed. (27 references) (LRW)

Describes a study of undergraduate students' search sessions on a full-text information retrieval system, NEXIS, that was conducted (1) to evaluate a novice user's ability to use such an information retrieval system, and (2) to analyze users' information seeking behavior. Sense-making theory and timeline interviews are discussed. (38 references)…

Discusses the shift of information access from a data-centered to a user-centered model and describes the Daltext system, a prototype user-centered information system that allows the user to determine how the data will be viewed (i.e., within a datastream model, a set model, a relational model, and/or a hierarchical model). (Contains 30…

Discusses information retrieval as an inherently interactive process utilizing a variety of information-seeking strategies on informational and meta-informational levels. An interface design for a bibliographic information retrieval system, called BRAQUE (BRowsing And QUEry), that supports user interactions in a two-level hypertext environment is…

Describes the design of a database interface for infrequent users of computers which consists of a graphical display of a model of a database and a natural language query language. This interface was designed for and tested with physicians at the University of Texas Health Science Center in Dallas. (LRW)

The increasing complexity of evaluating information retrieval (IR) systems is discussed in terms of contributing factors and research methods. Examples are provided from experiments with weighted searching on a front-end system, information-seeking behavior and online catalogs, and the OKAPI experimental retrieval system. (21 references) (LAE)

This overview of the research process for the novice information retrieval (IR) researcher provides guidance on selecting a research question, choosing the type of test, defining variables, developing or using databases, finding and processing queries, assigning treatments to experimental units, collecting and analyzing the data, and presenting…

Describes a study of medical students that was conducted to evaluate measures of performance on factual searches of INQUIRER, a full-text database in microbiology. Measures relating to recall, precision, search term overlap, and efficiency are discussed; reliability and construct validity are considered; and implications for future research are…