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Kaske, N.K.: ¬A comparative study of subject searching in an OPAC among branch libraries of a university library system (1988) 0.02

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Abstract: The degree of variability in the percentage of subject searching in an online public access catalog (OPAC) among branch libraries of one university was studied. A full semester's worth of transactions was analyzed, not sampled. The time units used were hour of the day, day of the week, and week of the semester. The findings show that subject searching varies from a low of 22% to a high of 74% over the hours of a day. Variability for the days of the week ranged from 17% to 64%, and for the weeks of the semester variability ranged from 12% to 70%. Valuable management information on the utilization of the OPAC within each brach library and among all the branch libraries is provided through numerous charts and graphs.

Markey, K.: Users and the online catalog : subject access problems (1986) 0.01

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Besant, L.: Early survey findings: users of public online catalogs want sophisticated subject access (1982) 0.01

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Carson, E.: OPACs: the user and subject access (1985) 0.01

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Cochrane, P.A.; Markey, K.: Catalog use studies : since the introduction of online interactive catalogs, impact on design for subject access (1983) 0.01

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Larson, R.R.: Users look at online catalogs : results of a national survey of users and non-users of online public access catalogs (1982) 0.01

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Peters, T.A.: When smart people fail : an analysis of the transaction log of an online public access catalog (1989) 0.01
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Abstract

This article reports on a low-cost study of the transaction log of an online public access catalog at an academic library. The three goals of the study were to determine failure rates, to study usage patterns, and to investigate problable causes of patron problems when using the OPAC. The study found that failure rates (defined as those searches that produced zero hits) of approximately 40% are common, and that usage patterns and failure rates do not vary greatly over time or from terminal to terminal, but that the distribution of probable causes of user problems varies significantly from terminal to terminal
Croucher, C.: Problems of subject access : user studies and interface design (1986) 0.01
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Abstract

A research project at Middlesex Polytechnic is examning the problems of subject access in an OPAC. A series of user studies have been carried out which examined students' use of existing catalogue facilities, which in turn led to the experimental evaluation of various interface designs for an online catalogue. The experiments were primarily concerned with the effect of the following variables on the speed and accuracy of retrieval of specific items, the use of colour, the speed of presentation of information, the amount of information on a screen, the paging and scrolling of information, the position of a sought item within a list

Lewis, D.W.: Research on the use of online catalogs and its implications for library practice (1987) 0.01

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Abstract: Research on the use of online catalogs has challenged many assumptions about the behavior of library users. It has demonstrated that many of the patterns of behavior observed in the use of card catalogs were adaptions to the card technology; often behavioral patterns are different in an online environment. These studies have indicated that patrons prefer online catalogs and use them more, but they also show inadequacies in bibliographic practice, especially in the area of subject access.

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