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: 04. Juni 2021)
1Wu, M. ; Turpin, A. ; Thom, J.A. ; Scholer, F. ; Wilkinson, R.: Cost and benefit estimation of experts' mediation in an enterprise search.
In: Journal of the Association for Information Science and Technology. 65(2014) no.1, S.146-163.
Abstract: The success of an enterprise information retrieval system is determined by interactions among three key entities: the search engine employed; the service provider who delivers, modifies, and maintains the engine; and the users of the service within the organization. Evaluations of an enterprise search have predominately focused on the effectiveness and efficiency of the engine, with very little analysis of user involvement in the process, and none on the role of service providers. We propose and evaluate a model of costs and benefits to a service provider when investing in enhancements to the ranking of documents returned by their search engine. We demonstrate the model through a case study to analyze the potential impact of using domain experts to provide enhanced mediated search results. By demonstrating how to quantify the cost and benefit of an improved information retrieval system to the service provider, our case study shows that using the relevance assessments of domain experts to rerank original search results can significantly improve the accuracy of ranked lists. Moreover, the service provider gains substantial return on investment and a higher search success rate by investing in the relevance assessments of domain experts. Our cost and benefit analysis results are contrasted with standard modes of effectiveness analysis, including quantitative (using measures such as precision) and qualitative (through user preference surveys) approaches. Modeling costs and benefits explicitly can provide useful insights that the other approaches do not convey.
Inhalt: Vgl.: http://onlinelibrary.wiley.com/doi/10.1002/asi.22951/abstract.
2Wu, M. ; Hawking, D. ; Turpin, A. ; Scholer, F.: Using anchor text for homepage and topic distillation search tasks.
In: Journal of the American Society for Information Science and Technology. 63(2012) no.6, S.1235-1255.
Abstract: Past work suggests that anchor text is a good source of evidence that can be used to improve web searching. Two approaches for making use of this evidence include fusing search results from an anchor text representation and the original text representation based on a document's relevance score or rank position, and combining term frequency from both representations during the retrieval process. Although these approaches have each been tested and compared against baselines, different evaluations have used different baselines; no consistent work enables rigorous cross-comparison between these methods. The purpose of this work is threefold. First, we survey existing fusion methods of using anchor text in search. Second, we compare these methods with common testbeds and web search tasks, with the aim of identifying the most effective fusion method. Third, we try to correlate search performance with the characteristics of a test collection. Our experimental results show that the best performing method in each category can significantly improve search results over a common baseline. However, there is no single technique that consistently outperforms competing approaches across different collections and search tasks.
3Wu, M.M. ; Liu, Y.-H.: On intermediaries' inquiring minds, elicitation styles, and user satisfaction.
In: Journal of the American Society for Information Science and Technology. 62(2011) no.12, S.2396-2403.
Abstract: Building upon previous research on the concepts of inquiring minds and elicitation styles (Wu, 2005; Wu & Liu, 2003), this study aims to identify the relationships between the theoretical constructs of elicitation behavior and user satisfaction in terms of the relevance, utility, and satisfaction of search results, search interaction processes, and overall search activities. Descriptive statistical analysis is applied to compare the user satisfaction ratings with respect to the concepts of inquiring minds and elicitation styles. The results suggest that the stereotyped elicitation style received the lowest user satisfaction ratings compared with functionally and situationally oriented styles. It is suggested that the intermediaries take into account the characteristics of search questions and, accordingly, adapt their professional mindsets to search interview situations; that is, using an inquiring mind in the query formulation process as default mode with functional and situational styles of elicitations would be helpful for enhancing the user's satisfaction ratings. Future research is suggested to better understand and to improve professional talk in information services.
4Wu, M.-M.: Understanding patrons' micro-level information seeking (MLIS) in information retrieval situations.
In: Information processing and management. 41(2005) no.4, S.929-947.
Abstract: Elicitation is a communicative act to request information during a dialogue, which reflects the questioner's problems at hand, perplexity, interests, or perhaps internal concerns, either voluntarily or unintentionally. A patron with an information need or a problem at hand approaches the retrieval system to ask their first question. However, many more communicative acts requesting information occur during the retrieval interaction. Elicitation during retrieval interaction, as distinct from the patron's first search question, is termed micro-level information seeking (MLIS). What features does MLIS possess? And is MLIS predictable? These are salient research issues because if a patron's MLIS is explainable and predictable, it is advantageous for the intermediary, be it human or an intelligent agent, to form a dynamic user model by taking the patron's MLIS into account to provide better information retrieval support. This study explores the following research questions: (1) What are the purposes of patron elicitations? (2) When does the patron's elicitation tend to occur? (3) Do patron elicitations differ from intermediary elicitations in terms of frequency of occurrence and time frame? (4) Does patron elicitation behavior relate to contextual variables, such as gender, age, status, knowledge, prior online search experience, individual intermediaries interacted with, or length of interaction? Qualitative and quantitative approaches including discourse analysis, content analysis and statistical analysis are applied. The major research findings include: (1) patrons' and intermediaries' elicitation behaviors differ in terms of frequency and time frame, supporting the prior assumption that intermediary elicitation is pre-planned and patron elicitation is situational; (2) patron's perplexity is situational, being in most cases "search-assignment related"; and (3) patrons' elicitation behavior is significantly related to their contextual variables. The study suggests dynamic user modeling to take account of the patron's MLIS.
5Wu, M.-M. ; Liu, Y.-H.: Intermediary's information seeking, inquiring minds, and elicitation styles.
In: Journal of the American Society for Information Science and technology. 54(2003) no.12, S.1117-1133.
Abstract: The current research explores how intermediaries seek information from patrons, in particular by analyzing intermediaries' elicitation utterances through three dimensions-linguistic forms, utterance purposes, and communicative functions-to determine whether indeed any dimension appeared consistently, to be called "elicitation styles." Five intermediaries from four academic libraries (three national university libraries, one private university library) and one research institute library participated in the study. Thirty patrons with 30 genuine search requests were recruited; thus, 30 patron/intermediary information retrieval interactions making a total of 30 encounters were collected. Video/audio data were taped. Dialogues between patron and intermediary were transcribed. Statistical analysis revealed three types of elicitation styles among the five intermediaries, labeled, (1) situationally oriented, (2) functionally oriented, and (3) stereotyped. This study seeks an explanation for different elicitation styles. Qualitative analysis was applied to investigate "inquiring minds." An inquiring mind is termed to represent a mentality or tendency that one elicits certain threads of questions influenced by Professional beliefs, individual characteristics, tasks, goals, and interactional contexts in conversation. The results of qualitative analysis specified three modes of inquiring minds of the intermediaries, namely: (1) information problem detection, (2) query formulation process, and (3) database instructions.
7Wu, M.-M.: ¬A preliminary study on the Chinese search terms.
In: Journal of library and information science. 23(1998) no.2, S.100-123.
Abstract: Reports results of an empirical study of Chinese language search terms in information retrieval. The 3 research questions involved: characteristics of access points used in Chinese bibliographic databases; characteristics of the search terms used in Chinese bibliographic databases; and how these search terms match the terms within the database in terms of zero hit and the number of relevant items received. Research methods include observation, in depth interviews and pre and post questionnaires
8Wu, M.-H. ; Martin, C.D.: ¬An exploratory study of user media preferences in a public setting.
In: Journal of educational multimedia and hypermedia. 6(1997) no.1, S.3-21.
Abstract: Examines the assumption that people want to be presented with as many different media as are possible in a given application. Reports on an exploratory study designed to assess the media preferences og the 'person on the street' when presented with the choice of 7 different media combinations to find out some unknown thing in a public space. Findings suggests that people do not always prefer to access as many different media as are available. There was a bias toward having some media combination that includes graphics, but there was also some bias against having information presented using sound in a public space