Presents an efficient spoken-access approach for both Chinese text and Mandarin speech information retrieval. Highlights include human-computer interaction via voice input, speech query recognition at the syllable level, automatic term suggestion, relevance feedback techniques, and experiments that show an improvement in the effectiveness of…

Based on systematic observations of five experienced online searchers, this model compares two searching styles: operationalist, which aims at optimal strategies to achieve precise retrieval and uses a large range of system capabilities, and conceptualist, which analyzes the request by seeking to fit it into a faceted structure. (13 references)…

Describes probabilistic document retrieval systems as a sequential learning process, in which the system learns the parameters of probability distributions describing the frequencies of feature occurrences in relevant and nonrelevant documents. Several techniques for estimating the parameters of distributions are described and the results of tests…

Reports results from a study exploring the information retrieval (IR) and types of interactive feedback during mediated IR. Five types of interactive feedback were identified, extending the interactive IR model to include relevance, magnitude, and strategy interactive feedback. Implications for further research investigating the nature and models…

Discusses individual differences between users of information systems that can influence search performance, and describes two experiments that addressed user-centered design of information systems. Highlights include interaction between cognitive abilities and design features; compensation and capitalization perspectives; recall and precision;…

An informal survey was conducted, tapping the opinions of scientists doing research related to the features that should or should not be included in the man-machine interface of interactive bibliographic search and retrieval (IBSR) systems. An analysis of the responses showed a significant level of agreement concerning interface features. (2…

Interactive systems must be designed to furnish error information to the user and must be able to accept a modification to the input and continue to cycle until convergence on the desired output is reached. (10 references) (Author)

Discusses artificial intelligence (AI) and considers four potential roles for AI in information retrieval (IR): (1) information characterization, i.e., building a knowledge base; (2) information seeking, i.e., search formulation; (3) support functions, including abstracting; and (4) systems integration. Three examples are given that show how AI…

As an exploration of the frustration experienced by users of an on-line interactive retrieval system, students participated in an experiment using an experimental reference retrieval system for library literature. It was anticipated that significant variations in user behavior would be displayed by the control and experimental groups. (19…

The virtues of interactive systems are speed, intimacy, and - if time-sharing is involved - economy. The major problems are the cost of the large computers and files necessary for bibliographic data, the still-high cost of communications, and the generally poor design of the user-system interfaces. (Author)

This first of two related articles by the same authors describes the philosophy, design, and implementation of an experimental translating computer system, CONIT, whose purpose was to investigate techniques for simplifying access to, and operation of, bibliographic retrieval systems. Forty-one references are cited. (FM)

This second of two related articles by the same authors evaluates the performance of an experimental translating computer system, CONIT, whose purpose was to investigate techniques for simplifying access to, and operation of, bibliographic retrieval systems. Forty-two references are cited. (FM)

Proposes algorithmic method of searching and presents experimental data testing efficacy of using Boolean negation to eliminate redundancy and reduce cognitive strain of communication barrier at human-computer interface. Cognitive information processes, concept of Boolean NOT, and problem-solving behavior are explored. Twenty-five references are…

Question analysis and search strategy development were broken down into nine steps for answering reference questions. These steps were examined for possible mechanization of the answering process. Such automation was not proved feasible. (LS)

The focus of this article is on the human interaction characteristics of an information retrieval system, some design considerations to improve man-machine cooperation, and a research system at Stanford that is exploring some of these techniques. (55 references) (Author/NH)