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  • × author_ss:"Hert, C.A."
  1. Nilan, M.S.; Hert, C.A.: Incorporating the user in system evaluation and design (1992) 0.00 
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    Abstract
    Suggests a user based approach to system design and evaluation, of computerized library systems (e.g. OPACs), which is application specific. Data was collected on 93 end user interactions with a newly implemented OPAC in a large US university library. Concludes that researchers need to explore questions relating directly to problems, faced by users and to present findings in ways which provide action oriented recommendations
    Type
    a
  2. Hert, C.A.: Exploring a new model for understanding information retrieval interactions (1992) 0.00 
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    Abstract
    Describes a project to pull together several different strands of research into the information retrieval process by the inductive development of a model of the information retrieval process. Using the constant comparative method, user interactions with systems as represented by talk aloud protocols and post search interviews were analysed to develop the model. preliminary results, based on an analysis of the interactions and interviews of 5 users of an OPAC, suggest new variables and elements of the information retrieval process which need to be considered in later research
    Type
    a
  3. Harter, S.P.; Hert, C.A.: Evaluation of information retrieval systems : approaches, issues, and methods (1997) 0.00 
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    Abstract
    State of the art review of information retrieval systems, defined as systems retrieving documents a sopposed to numerical data. Explains the classic Cranfield studies that have served as a standard for retrieval testing since the 1960s and discusses the Cranfield model and its relevance based measures of retrieval effectiveness. Details sosme of the problems with the Cranfield instruments and issues of validity and reliability, generalizability, usefulness and basic concepts. Discusses the evaluation of the Internet search engines in light of the Cranfield model, noting the very real differences between batch systems (Cranfield) and interactive systems (Internet). Because the Internet collection is not fixed, it is impossible to determine recall as a measure of retrieval effectiveness. considers future directions in evaluating information retrieval systems
    Type
    a
  4. Hert, C.A.: Information retrieval as situated action (1995) 0.00 
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    Abstract
    In an inductive, qualitative study of 30 university students at University of Syracuse, USA, it was found that their OPAC interactions were a series of situated actions. By situatedness it is meant that as a user moves through an interaction, his or her actions are not completely predetermined, instead elements of the situation are utilized to determine action. Identifies and describes the set of elements used by students in determining action
    Type
    a
  5. Hert, C.A.: User goals on an online public access catalog (1996) 0.00 
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    Abstract
    An ongoing thread in information retrieval research has been the exploration of user goals (or information needs, or problems) on information retrieval systems. It has been suggested that an understanding of goals and their role in the information retrieval interaction can provide insight into appropriate retrieval strategies, relevant documents, and general system design. This article reports on empirical findings concerning goals of users searching an OPAC at a northeastern United States university. These findings were generated during a large inductive and qualitative study of users' interactions with the OPAC. It was found that respondents came to the OPAC to search for a variety of course- or degree-related projects in which they were engaged. Respondent goals were not greatly modified during the course of these interactions. A set of situational elements associated with the respondent's goal was also identified. The implications of these findings for OPAC design and the training of informational professionals are discussed
    Type
    a
  6. Hert, C.A.; Jacob, E.K.; Dawson, P.: ¬A usability assessment of online indexing structures in the networked environment (2000) 0.00 
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    Abstract
    Usability of Web sites has become an increasingly important area of research as Web sites proliferate and problems with use are noted. Generally, aspects of Web sites that have been investigated focus on such areas as overall design and navigation. The exploratory study reported on here investigates one specific component of a Web site-the index structure. By employing index usability metrics developed by Liddy and Jörgensen (1993; Jörgensen & Liddy, 1996) and modified to accommodate a hypertext environment, the study compared the effectiveness and efficiency of 20 subjects who used one existing index (the A-Z index on the FedStats Web site at http://www.fedstats.gov) and three experimental variants to complete five researcher-generated tasks. User satisfaction with the indexes was also evaluated. The findings indicate that a hypertext index with multiple access points for each concept, all linked to the same resource, led to greater effectiveness and efficiency of retrieval on almost all measures. Satisfaction measures were more variable. The study offers insight into potential improvements in the design of Web-based indexes and provides preliminary assessment of the validity of the measures employed
    Type
    a
  7. Hert, C.A.; Nilan, M.S.: User-based information retrieval evaluation : an examination of an online public access catalog (1991) 0.00 
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    Abstract
    Suggests that an appropriate method for evaluating information retrieval systems is to focus on the individual actions users attempts to perform on a system. The evaluation criterion 'degree of match' between attempted actions and actual system commands is one of a series of evaluation measures including perceived measures and summary measures that were investigated. Results indicate that there is the potential for significant improvement of the OPAC's interface, particularly those parts of the interface which concern searching and revision activities
    Type
    a
  8. Hert, C.A.; Denn, S.O.; Gillman, D.W.; Oh, J.S.; Pattuelli, M.C.; Hernandez, N.: Investigating and modeling metadata use to support information architecture development in the statistical knowledge network (2007) 0.00 
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    Abstract
    Metadata and an appropriate metadata model are nontrivial components of information architecture conceptualization and implementation, particularly when disparate and dispersed systems are integrated. Metadata availability can enhance retrieval processes, improve information organization and navigation, and support management of digital objects. To support these activities efficiently, metadata need to be modeled appropriately for the tasks. The authors' work focuses on how to understand and model metadata requirements to support the work of end users of an integrative statistical knowledge network (SKN). They report on a series of user studies. These studies provide an understanding of metadata elements necessary for a variety of user-oriented tasks, related business rules associated with the use of these elements, and their relationship to other perspectives on metadata model development. This work demonstrates the importance of the user perspective in this type of design activity and provides a set of strategies by which the results of user studies can be systematically utilized to support that design.
    Type
    a
  9. Hert, C.A.: Information retrieval as situated action (1995) 0.00 
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    Abstract
    In an inductive, qualitative study of 30 university students (ranging from freshmen to doctoral students), it was found that their OPAC interactions were a series of situated actions. By situatedness is meant that as a user moves through an interaction, his or her actions are not completely predetermined, instead elements of the situation are utilized to determine action. The set of elements used by students in determining action is identified and described

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