Diese Datenbank enthält über 40.000 Dokumente zu Themen aus den Bereichen Formalerschließung – Inhaltserschließung – Information Retrieval.
© 2015 W. Gödert, TH Köln, Institut für Informationswissenschaft / Powered by litecat, BIS Oldenburg (Stand: 13. Juni 2017)
1Golub, K. ; Soergel, D. ; Buchanan, G. ; Tudhope, D. ; Lykke, M. ; Hiom, D.: ¬A framework for evaluating automatic indexing or classification in the context of retrieval.
In: Journal of the Association for Information Science and Technology. 67(2016) no.1, S.3-16.
(Advances in information science)
Abstract: Tools for automatic subject assignment help deal with scale and sustainability in creating and enriching metadata, establishing more connections across and between resources and enhancing consistency. Although some software vendors and experimental researchers claim the tools can replace manual subject indexing, hard scientific evidence of their performance in operating information environments is scarce. A major reason for this is that research is usually conducted in laboratory conditions, excluding the complexities of real-life systems and situations. The article reviews and discusses issues with existing evaluation approaches such as problems of aboutness and relevance assessments, implying the need to use more than a single "gold standard" method when evaluating indexing and retrieval, and proposes a comprehensive evaluation framework. The framework is informed by a systematic review of the literature on evaluation approaches: evaluating indexing quality directly through assessment by an evaluator or through comparison with a gold standard, evaluating the quality of computer-assisted indexing directly in the context of an indexing workflow, and evaluating indexing quality indirectly through analyzing retrieval performance.
Inhalt: Vgl.: http://onlinelibrary.wiley.com/doi/10.1002/asi.23600/abstract.
Themenfeld: Automatisches Indexieren ; Automatisches Klassifizieren
2Warwick, C. ; Rimmer, J. ; Blandford, A. ; Gow, J. ; Buchanan, G.: Cognitive economy and satisficing in information seeking : a longitudinal study of undergraduate information behavior.
In: Journal of the American Society for Information Science and Technology. 60(2009) no.12, S.2402-2415.
Abstract: This article reports on a longitudinal study of information seeking by undergraduate information management students. It describes how they found and used information, and explores their motivation and decision making. We employed a use-in-context approach where students were observed conducting, and were interviewed about, information-seeking tasks carried out during their academic work. We found that participants were reluctant to engage with a complex range of information sources, preferring to use the Internet. The main driver for progress in information seeking was the immediate demands of their work (e.g., assignments). Students used their growing expertise to justify a conservative information strategy, retaining established strategies as far as possible and completing tasks with minimum information-seeking effort. The time cost of using library material limited the uptake of such resources. New methods for discovering and selecting information were adopted only when immediately relevant to the task at hand, and tasks were generally chosen or interpreted in ways that minimized the need to develop new strategies. Students were driven by the demands of the task to use different types of information resources, but remained reluctant to move beyond keyword searches, even when they proved ineffective. They also lacked confidence in evaluating the relative usefulness of resources. Whereas existing literature on satisficing has focused on stopping conditions, this work has highlighted a richer repertoire of satisficing behaviors.
3Hinze, A. ; Buchanan, G. ; Bainbridge, D. ; Witten, I.: Semantics in Greenstone.
In: Semantic digital libraries. Eds.: S.R. Kruk, B. McDaniel. Berlin : Springer, 2009. S.163-176.
Abstract: This chapter illustrates the impact on a well-known digital library system Greenstone when it is moved from fixed modules and simple metadatabased structures, to open semantic digital library modules. This change has profound effects on the tools available to end-users to retrieve relevant content from the library, and an equally significant impact on the digital library (DL) architecture. Most current DL systems contain protocols for internal communication that define information exchange solely in terms of searching, browsing, and document retrieval. These communications reect traditional user interactions in the library. However, this regimented approach results in inexible systems that are difficult to extend to support other retrieval techniques. Furthermore, simple field-based metadata limits the ability of the DL to connect or disambiguate key items of information, impeding the precision of retrieval.
Inhalt: Vgl. die digitale Ausgabe unter: http://www.springerlink.com/content/h3082t05780j2w13/.
Objekt: Greenstone ; FRBR
4Blandford, A. ; Adams, A. ; Attfield, S. ; Buchanan, G. ; Gow, J. ; Makri, S. ; Rimmer, J. ; Warwick, C.: ¬The PRET A Rapporter framework : evaluating digital libraries from the perspective of information work.
In: Information processing and management. 44(2008) no.1, S.4-21.
Abstract: The strongest tradition of IR systems evaluation has focused on system effectiveness; more recently, there has been a growing interest in evaluation of Interactive IR systems, balancing system and user-oriented evaluation criteria. In this paper we shift the focus to considering how IR systems, and particularly digital libraries, can be evaluated to assess (and improve) their fit with users' broader work activities. Taking this focus, we answer a different set of evaluation questions that reveal more about the design of interfaces, user-system interactions and how systems may be deployed in the information working context. The planning and conduct of such evaluation studies share some features with the established methods for conducting IR evaluation studies, but come with a shift in emphasis; for example, a greater range of ethical considerations may be pertinent. We present the PRET A Rapporter framework for structuring user-centred evaluation studies and illustrate its application to three evaluation studies of digital library systems.
Anmerkung: Beitrag eines Themenbereichs: Evaluation of Interactive Information Retrieval Systems
Themenfeld: Retrievalstudien ; Information Gateway
5Rimmer, J. ; Warwick, C. ; Blandford, A. ; Gow, J. ; Buchanan, G.: ¬An examination of the physical and the digital qualities of humanities research.
In: Information processing and management. 44(2008) no.3, S.1374-1392.
Abstract: Traditionally humanities scholars have worked in physical environments and with physical artefacts. Libraries are familiar places, built on cultural traditions over thousands of years, and books are comfortable research companions. Digital tools are a more recent addition to the resources available to a researcher. This paper explores both the physical and the digital qualities of modern humanities research, drawing on existing literature and presenting a study of humanities scholars' perceptions of the research resources they use. We highlight aspects of the physical and digital that can facilitate or hinder the researcher, focusing on three themes that emerge from the data: the working environment; the experience of finding resources; and the experience of working with documents. Rather than aiming to replace physical texts and libraries by digital surrogates, providers need to recognise the complementary roles they play: digital information environments have the potential to provide improved access and analysis features and the facility to exploit the library from any place, while the physical library and resources provide greater authenticity, trustworthiness and the demand to be in a particular place with important material properties.
6Makri, S. ; Blandford, A. ; Gow, J. ; Rimmer, J. ; Warwick, C. ; Buchanan, G.: ¬A library or just another information resource? : a case study of users' mental models of taditional and digital libraries.
In: Journal of the American Society for Information Science and Technology. 58(2007) no.3, S.433-445.
Abstract: A user's understanding of the libraries they work in, and hence of what they can do in those libraries, is encapsulated in their "mental models" of those libraries. In this article, we present a focused case study of users' mental models of traditional and digital libraries based on observations and interviews with eight participants. It was found that a poor understanding of access restrictions led to risk-averse behavior, whereas a poor understanding of search algorithms and relevance ranking resulted in trial-and-error behavior. This highlights the importance of rich feedback in helping users to construct useful mental models. Although the use of concrete analogies for digital libraries was not widespread, participants used their knowledge of Internet search engines to infer how searching might work in digital libraries. Indeed, most participants did not clearly distinguish between different kinds of digital resource, viewing the electronic library catalogue, abstracting services, digital libraries, and Internet search engines as variants on a theme.
7Jones, M. ; Buchanan, G. ; Cheng, T.-C. ; Jain, P.: Changing the pace of search : supporting background information seeking.
In: Journal of the American Society for Information Science and Technology. 57(2006) no.6, S.838-842.
Abstract: Almost all Web searches are carried out while the user is sitting at a conventional desktop computer connected to the Internet. Although online, handheld, mobile search offers new possibilities, the fast-paced, focused style of interaction may not be appropriate for all user search needs. The authors explore an alternative, relaxed style for Web searching that asynchronously combines an offline handheld computer and an online desktop personal computer. They discuss the role and utility of such an approach, present a tool to meet these user needs, and discuss its relation to other systems.
Anmerkung: Beitrag in einer Special Section "Perspectives on Search User Interfaces: Best Practices and Future Visions"