-
Krause, J.; Womser-Hacker, C.: PADOK-II : Retrievaltests zur Bewertung von Volltextindexierungsvarianten für das deutsche Patentinformationssystem (1990)
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- Abstract
- Vorgestellt werden die Ergebnisse extensiver Retrievaltests von zwei Varianten von Inhalteserschließungen (Freitext und PASSAT) für das deutsche Patentinformationssystem auf der Basis von Volltexten. Die Tests führte die Fachgruppe Linguistische Informationswissenschaft der Universität Regensburg von 1986-1989 in Zusammenarbeit mit dem Deutschen Patentamt, dem Fachinformationszentrum Karlsruhe und meheren industrieellen Partnern durch. Der Schwerpunkt des Berichts liegt auf dem allgemeinen Ansatz der Bewertung der Ziele des Projekts und auf der Darstellung der statistischen Evaluierungsergebnisse.
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- a
-
Cowie, J.; Guan, Z.: CRL English routing system for TREC-5 (1997)
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Yiqun, W.; Zhonghui, Z.; Li, Z.: Experimental study of machine factors and cognitive abilities of users (1998)
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Bollmann-Sdorra, P.: Probleme der Validität bei Retrievaltests (1990)
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- Abstract
- In diesem Beitrag werden beispielhaft Probleme der Validität bei Retrievaltests behandelt. Die externe Validität wird im Zusammenhang von Ähnlichkeitsmaßen und Bewertungsmaßen diskutiert. Die interne Validität wird am Beispiel der Mittelwertbildung diskutiert. Es zeigt sich, daß die Forderung nach Validität die zur Auswahl stehenden Methoden einschränkt
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- a
-
Dalrymple, P.W.: Retrieval by reformulation in two library catalogs : toward a cognitive model of searching behavior (1990)
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- Date
- 22. 7.2006 18:43:54
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- a
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Tomaiuolo, N.G.; Parker, J.: Maximizing relevant retrieval : keyword and natural language searching (1998)
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- Source
- Online. 22(1998) no.6, S.57-58
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- a
-
Kaltenborn, K.-F.: Endnutzerrecherchen in der CD-ROM-Datenbank Medline : T.1: Evaluations- und Benutzerforschung über Nutzungscharakteristika, Bewertung der Rechercheergebnisse und künftige Informationsgewinnung; T.2: Evaluations- und Benutzerforschung über Recherchequalität und Nutzer-Computer/Datenbank-Interaktion (1991)
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- Abstract
- Die Einführung von CD-ROM Datenbanken als neue Informationstechnologie hat die Formen der Informationsgewinnung in bestimmten wissenschaftlichen Fachgebieten grundlegend geändert. Der Beitrag berichtet über Ergebnisse wissenschaftlicher Begleitforschung bei Endnutzerrecherchen in der CD-ROM-Version der Datenbank MEDLINE. Hierzu wurden drei verschiedene Erhebungen durchgeführt. Hiernach ist die überwiegende Zahl der Endnutzer (89,3%) mit dem jeweiligen Rechercheresultat zufrieden, wobei Benutzer mit geringer Rechercheerfahrung eine höhere Zufriedenheitsrate erreichen als Benutzer mit umfangreicheren Recherchekenntnissen. Die Gründe zur Nutzung von CD-ROM-Systemen resultieren voriwegend aus der klinischen Alltagsroutine oder täglichen Forschungspraxis, während vermittelte Online-Literatursuchen tendenziell häufiger im Zusammenhang mit einmaligen Ereignissen der wissenschaftlichen Aus- und Weiterbildung stehen. Die selbständige CD-ROM Literaturrecherche stellt für die befragten Ärzte und Wissenschaftler die bevorzugte Methode der Informationsgewinnung dar. Die analysierten Endnutzerrecherchen weisen allerdings Fehler und Defizite hinsichtlich einer optimalen Suchstrategie auf, die zu unbemerktn Informationsverlusten und zu Fehlbeurteilungen des wissenschaftlichen Kenntnisstandes führen
- Type
- a
-
Bauer, G.; Schneider, C.: PADOK-II : Untersuchungen zur Volltextproblematik und zur interpretativen Analyse der Retrievalprotokolle (1990)
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- Abstract
- Dieser Beitrag baut auf dem Bericht über das methodische Konzept, über die Durchführung und die Ergebnisse der PADOK-II-Retrievaltests auf (Krause/Wormser-Hacker). Hier werden die Ergebnisse von Zusatztests zum Einfluß des Umfangs der zugrundeliegenden Dokumente (Volltext vs. Titel+Abstract) beschrieben, die eine deutliche Beeinträchtigung der Recall-Werte bei reduziertem Dokumentenumfang zeigen. Zur interpretativen Analyse der Retrievalprotokolle werden vor allem die methodische Einbindung, Ansatzpunkte der Analyse und erste Ergebnisse vorgestelt.
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- a
-
Allan, J.; Callan, J.P.; Croft, W.B.; Ballesteros, L.; Broglio, J.; Xu, J.; Shu, H.: INQUERY at TREC-5 (1997)
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- Date
- 27. 2.1999 20:55:22
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Ng, K.B.; Loewenstern, D.; Basu, C.; Hirsh, H.; Kantor, P.B.: Data fusion of machine-learning methods for the TREC5 routing tak (and other work) (1997)
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- 27. 2.1999 20:59:22
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Pemberton, J.K.; Ojala, M.; Garman, N.: Head to head : searching the Web versus traditional services (1998)
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- Abstract
- Describes of 3 searches on the topic of virtual communities done on the WWW using HotBot and traditional databases using LEXIS-NEXIS and ABI/Inform. Concludes that the WWW is a good starting place for a broad concept search but the traditional services are better for more precise topics
- Source
- Online. 22(1998) no.3, S.24-26,28
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- a
-
Sanderson, M.: ¬The Reuters test collection (1996)
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- Source
- Information retrieval: new systems and current research. Proceedings of the 16th Research Colloquium of the British Computer Society Information Retrieval Specialist Group, Drymen, Scotland, 22-23 Mar 94. Ed.: R. Leon
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- a
-
Lespinasse, K.: TREC: une conference pour l'evaluation des systemes de recherche d'information (1997)
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- Date
- 1. 8.1996 22:01:00
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- a
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Losee, R.M.: Determining information retrieval and filtering performance without experimentation (1995)
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- Abstract
- The performance of an information retrieval or text and media filtering system may be determined through analytic methods as well as by traditional simulation or experimental methods. These analytic methods can provide precise statements about expected performance. They can thus determine which of 2 similarly performing systems is superior. For both a single query terms and for a multiple query term retrieval model, a model for comparing the performance of different probabilistic retrieval methods is developed. This method may be used in computing the average search length for a query, given only knowledge of database parameter values. Describes predictive models for inverse document frequency, binary independence, and relevance feedback based retrieval and filtering. Simulation illustrate how the single term model performs and sample performance predictions are given for single term and multiple term problems
- Date
- 22. 2.1996 13:14:10
- Type
- a
-
Sachse, E.; Liebig, M.; Gödert, W.: Automatische Indexierung unter Einbeziehung semantischer Relationen : Ergebnisse des Retrievaltests zum MILOS II-Projekt (1998)
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- Abstract
- Im Rahmen von MILOS II wurde das erste MILOS-Projekt zur automatischen Indexierung von Titeldaten um eine semantischer Komponente erweitert, indem Thesaurusrelationen der Schlagwortnormdatei eingebunden wurden. Der abschließend zur Evaluierung durchgeführte Retrievaltest und seine Ergebnisse stehen im Mittelpunkt dieses Texts. Zusätzlich wird ein Überblick über bereits durchgeführte Retrievaltests (vorwiegend des anglo-amerikanischen Raums) gegeben und es wird erläutert, welche grundlegenden Fragestellungen bei der praktischen Durchführung eines Retrievaltests zu beachten sind
-
Smithson, S.: Information retrieval evaluation in practice : a case study approach (1994)
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- Abstract
- The evaluation of information retrieval systems is an important yet difficult operation. This paper describes an exploratory evaluation study that takes an interpretive approach to evaluation. The longitudinal study examines evaluation through the information-seeking behaviour of 22 case studies of 'real' users. The eclectic approach to data collection produced behavioral data that is compared with relevance judgements and satisfaction ratings. The study demonstrates considerable variations among the cases, among different evaluation measures within the same case, and among the same measures at different stages within a single case. It is argued that those involved in evaluation should be aware of the difficulties, and base any evaluation on a good understanding of the cases in question
- Type
- a
-
Brown, M.E.: By any other name : accounting for failure in the naming of subject categories (1995)
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- Abstract
- Research shows that 65-80% of subject search terms fail to match the appropriate subject heading and one third to one half of subject searches result in no references being retrieved. Examines the subject search terms geberated by 82 school and college students in Princeton, NJ, evaluated the match between the named terms and the expected subject headings, proposes an explanation for match failures in relation to 3 invariant properties common to all search terms: concreteness, complexity, and syndeticity. Suggests that match failure is a consequence of developmental naming patterns and that these patterns can be overcome through the use of metacognitive naming skills
- Date
- 2.11.1996 13:08:22
- Type
- a
-
Blair, D.C.: STAIRS Redux : thoughts on the STAIRS evaluation, ten years after (1996)
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- Source
- Journal of the American Society for Information Science. 47(1996) no.1, S.4-22
- Type
- a
-
Crestani, F.; Rijsbergen, C.J. van: Information retrieval by imaging (1996)
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- Abstract
- Explains briefly what constitutes the imaging process and explains how imaging can be used in information retrieval. Proposes an approach based on the concept of: 'a term is a possible world'; which enables the exploitation of term to term relationships which are estimated using an information theoretic measure. Reports results of an evaluation exercise to compare the performance of imaging retrieval, using possible world semantics, with a benchmark and using the Cranfield 2 document collection to measure precision and recall. Initially, the performance imaging retrieval was seen to be better but statistical analysis proved that the difference was not significant. The problem with imaging retrieval lies in the amount of computations needed to be performed at run time and a later experiement investigated the possibility of reducing this amount. Notes lines of further investigation
- Source
- Information retrieval: new systems and current research. Proceedings of the 16th Research Colloquium of the British Computer Society Information Retrieval Specialist Group, Drymen, Scotland, 22-23 Mar 94. Ed.: R. Leon
- Type
- a
-
Iivonen, M.: Consistency in the selection of search concepts and search terms (1995)
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- Abstract
- Considers intersearcher and intrasearcher consistency in the selection of search terms. Based on an empirical study where 22 searchers from 4 different types of search environments analyzed altogether 12 search requests of 4 different types in 2 separate test situations between which 2 months elapsed. Statistically very significant differences in consistency were found according to the types of search environments and search requests. Consistency was also considered according to the extent of the scope of search concept. At level I search terms were compared character by character. At level II different search terms were accepted as the same search concept with a rather simple evaluation of linguistic expressions. At level III, in addition to level II, the hierarchical approach of the search request was also controlled. At level IV different search terms were accepted as the same search concept with a broad interpretation of the search concept. Both intersearcher and intrasearcher consistency grew most immediately after a rather simple evaluation of linguistic impressions
- Type
- a
