Search (140 results, page 1 of 7)

  • × theme_ss:"Retrievalstudien"
  1. Sanderson, M.: ¬The Reuters test collection (1996) 0.05
    0.054925613 = product of:
      0.109851226 = sum of:
        0.109851226 = sum of:
          0.053188704 = weight(_text_:research in 6971) [ClassicSimilarity], result of:
            0.053188704 = score(doc=6971,freq=4.0), product of:
              0.1491455 = queryWeight, product of:
                2.8529835 = idf(docFreq=6931, maxDocs=44218)
                0.05227703 = queryNorm
              0.35662293 = fieldWeight in 6971, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                2.8529835 = idf(docFreq=6931, maxDocs=44218)
                0.0625 = fieldNorm(doc=6971)
          0.056662526 = weight(_text_:22 in 6971) [ClassicSimilarity], result of:
            0.056662526 = score(doc=6971,freq=2.0), product of:
              0.18306525 = queryWeight, product of:
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.05227703 = queryNorm
              0.30952093 = fieldWeight in 6971, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.0625 = fieldNorm(doc=6971)
      0.5 = coord(1/2)
    
    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
  2. Brown, M.E.: By any other name : accounting for failure in the naming of subject categories (1995) 0.05
    0.048059914 = product of:
      0.09611983 = sum of:
        0.09611983 = sum of:
          0.04654012 = weight(_text_:research in 5598) [ClassicSimilarity], result of:
            0.04654012 = score(doc=5598,freq=4.0), product of:
              0.1491455 = queryWeight, product of:
                2.8529835 = idf(docFreq=6931, maxDocs=44218)
                0.05227703 = queryNorm
              0.31204507 = fieldWeight in 5598, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                2.8529835 = idf(docFreq=6931, maxDocs=44218)
                0.0546875 = fieldNorm(doc=5598)
          0.04957971 = weight(_text_:22 in 5598) [ClassicSimilarity], result of:
            0.04957971 = score(doc=5598,freq=2.0), product of:
              0.18306525 = queryWeight, product of:
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.05227703 = queryNorm
              0.2708308 = fieldWeight in 5598, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.0546875 = fieldNorm(doc=5598)
      0.5 = coord(1/2)
    
    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
    Source
    Library and information science research. 17(1995) no.4, S.347-385
  3. Lespinasse, K.: TREC: une conference pour l'evaluation des systemes de recherche d'information (1997) 0.05
    0.04713631 = product of:
      0.09427262 = sum of:
        0.09427262 = sum of:
          0.037610095 = weight(_text_:research in 744) [ClassicSimilarity], result of:
            0.037610095 = score(doc=744,freq=2.0), product of:
              0.1491455 = queryWeight, product of:
                2.8529835 = idf(docFreq=6931, maxDocs=44218)
                0.05227703 = queryNorm
              0.2521705 = fieldWeight in 744, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                2.8529835 = idf(docFreq=6931, maxDocs=44218)
                0.0625 = fieldNorm(doc=744)
          0.056662526 = weight(_text_:22 in 744) [ClassicSimilarity], result of:
            0.056662526 = score(doc=744,freq=2.0), product of:
              0.18306525 = queryWeight, product of:
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.05227703 = queryNorm
              0.30952093 = fieldWeight in 744, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.0625 = fieldNorm(doc=744)
      0.5 = coord(1/2)
    
    Abstract
    TREC ia an annual conference held in the USA devoted to electronic systems for large full text information searching. The conference deals with evaluation and comparison techniques developed since 1992 by participants from the research and industrial fields. The work of the conference is destined for designers (rather than users) of systems which access full text information. Describes the context, objectives, organization, evaluation methods and limits of TREC
    Date
    1. 8.1996 22:01:00
  4. ¬The Fifth Text Retrieval Conference (TREC-5) (1997) 0.05
    0.04713631 = product of:
      0.09427262 = sum of:
        0.09427262 = sum of:
          0.037610095 = weight(_text_:research in 3087) [ClassicSimilarity], result of:
            0.037610095 = score(doc=3087,freq=2.0), product of:
              0.1491455 = queryWeight, product of:
                2.8529835 = idf(docFreq=6931, maxDocs=44218)
                0.05227703 = queryNorm
              0.2521705 = fieldWeight in 3087, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                2.8529835 = idf(docFreq=6931, maxDocs=44218)
                0.0625 = fieldNorm(doc=3087)
          0.056662526 = weight(_text_:22 in 3087) [ClassicSimilarity], result of:
            0.056662526 = score(doc=3087,freq=2.0), product of:
              0.18306525 = queryWeight, product of:
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.05227703 = queryNorm
              0.30952093 = fieldWeight in 3087, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.0625 = fieldNorm(doc=3087)
      0.5 = coord(1/2)
    
    Abstract
    Proceedings of the 5th TREC-confrerence held in Gaithersburgh, Maryland, Nov 20-22, 1996. Aim of the conference was discussion on retrieval techniques for large test collections. Different research groups used different techniques, such as automated thesauri, term weighting, natural language techniques, relevance feedback and advanced pattern matching, for information retrieval from the same large database. This procedure makes it possible to compare the results. The proceedings include papers, tables of the system results, and brief system descriptions including timing and storage information
  5. Ellis, D.: Progress and problems in information retrieval (1996) 0.05
    0.04713631 = product of:
      0.09427262 = sum of:
        0.09427262 = sum of:
          0.037610095 = weight(_text_:research in 789) [ClassicSimilarity], result of:
            0.037610095 = score(doc=789,freq=2.0), product of:
              0.1491455 = queryWeight, product of:
                2.8529835 = idf(docFreq=6931, maxDocs=44218)
                0.05227703 = queryNorm
              0.2521705 = fieldWeight in 789, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                2.8529835 = idf(docFreq=6931, maxDocs=44218)
                0.0625 = fieldNorm(doc=789)
          0.056662526 = weight(_text_:22 in 789) [ClassicSimilarity], result of:
            0.056662526 = score(doc=789,freq=2.0), product of:
              0.18306525 = queryWeight, product of:
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.05227703 = queryNorm
              0.30952093 = fieldWeight in 789, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.0625 = fieldNorm(doc=789)
      0.5 = coord(1/2)
    
    Abstract
    An introduction to the principal generic approaches to information retrieval research with their associated concepts, models and systems, this text is designed to keep the information professional up to date with the major themes and developments that have preoccupied researchers in recent month in relation to textual and documentary retrieval systems.
    Date
    26. 7.2002 20:22:46
  6. ¬The Eleventh Text Retrieval Conference, TREC 2002 (2003) 0.05
    0.04713631 = product of:
      0.09427262 = sum of:
        0.09427262 = sum of:
          0.037610095 = weight(_text_:research in 4049) [ClassicSimilarity], result of:
            0.037610095 = score(doc=4049,freq=2.0), product of:
              0.1491455 = queryWeight, product of:
                2.8529835 = idf(docFreq=6931, maxDocs=44218)
                0.05227703 = queryNorm
              0.2521705 = fieldWeight in 4049, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                2.8529835 = idf(docFreq=6931, maxDocs=44218)
                0.0625 = fieldNorm(doc=4049)
          0.056662526 = weight(_text_:22 in 4049) [ClassicSimilarity], result of:
            0.056662526 = score(doc=4049,freq=2.0), product of:
              0.18306525 = queryWeight, product of:
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.05227703 = queryNorm
              0.30952093 = fieldWeight in 4049, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.0625 = fieldNorm(doc=4049)
      0.5 = coord(1/2)
    
    Abstract
    Proceedings of the llth TREC-conference held in Gaithersburg, Maryland (USA), November 19-22, 2002. Aim of the conference was discussion an retrieval and related information-seeking tasks for large test collection. 93 research groups used different techniques, for information retrieval from the same large database. This procedure makes it possible to compare the results. The tasks are: Cross-language searching, filtering, interactive searching, searching for novelty, question answering, searching for video shots, and Web searching.
  7. Chu, H.: Factors affecting relevance judgment : a report from TREC Legal track (2011) 0.04
    0.043987893 = product of:
      0.087975785 = sum of:
        0.087975785 = sum of:
          0.052561704 = weight(_text_:research in 4540) [ClassicSimilarity], result of:
            0.052561704 = score(doc=4540,freq=10.0), product of:
              0.1491455 = queryWeight, product of:
                2.8529835 = idf(docFreq=6931, maxDocs=44218)
                0.05227703 = queryNorm
              0.352419 = fieldWeight in 4540, product of:
                3.1622777 = tf(freq=10.0), with freq of:
                  10.0 = termFreq=10.0
                2.8529835 = idf(docFreq=6931, maxDocs=44218)
                0.0390625 = fieldNorm(doc=4540)
          0.03541408 = weight(_text_:22 in 4540) [ClassicSimilarity], result of:
            0.03541408 = score(doc=4540,freq=2.0), product of:
              0.18306525 = queryWeight, product of:
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.05227703 = queryNorm
              0.19345059 = fieldWeight in 4540, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.0390625 = fieldNorm(doc=4540)
      0.5 = coord(1/2)
    
    Abstract
    Purpose - This study intends to identify factors that affect relevance judgment of retrieved information as part of the 2007 TREC Legal track interactive task. Design/methodology/approach - Data were gathered and analyzed from the participants of the 2007 TREC Legal track interactive task using a questionnaire which includes not only a list of 80 relevance factors identified in prior research, but also a space for expressing their thoughts on relevance judgment in the process. Findings - This study finds that topicality remains a primary criterion, out of various options, for determining relevance, while specificity of the search request, task, or retrieved results also helps greatly in relevance judgment. Research limitations/implications - Relevance research should focus on the topicality and specificity of what is being evaluated as well as conducted in real environments. Practical implications - If multiple relevance factors are presented to assessors, the total number in a list should be below ten to take account of the limited processing capacity of human beings' short-term memory. Otherwise, the assessors might either completely ignore or inadequately consider some of the relevance factors when making judgment decisions. Originality/value - This study presents a method for reducing the artificiality of relevance research design, an apparent limitation in many related studies. Specifically, relevance judgment was made in this research as part of the 2007 TREC Legal track interactive task rather than a study devised for the sake of it. The assessors also served as searchers so that their searching experience would facilitate their subsequent relevance judgments.
    Date
    12. 7.2011 18:29:22
  8. Blair, D.C.: STAIRS Redux : thoughts on the STAIRS evaluation, ten years after (1996) 0.04
    0.04124427 = product of:
      0.08248854 = sum of:
        0.08248854 = sum of:
          0.03290883 = weight(_text_:research in 3002) [ClassicSimilarity], result of:
            0.03290883 = score(doc=3002,freq=2.0), product of:
              0.1491455 = queryWeight, product of:
                2.8529835 = idf(docFreq=6931, maxDocs=44218)
                0.05227703 = queryNorm
              0.22064918 = fieldWeight in 3002, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                2.8529835 = idf(docFreq=6931, maxDocs=44218)
                0.0546875 = fieldNorm(doc=3002)
          0.04957971 = weight(_text_:22 in 3002) [ClassicSimilarity], result of:
            0.04957971 = score(doc=3002,freq=2.0), product of:
              0.18306525 = queryWeight, product of:
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.05227703 = queryNorm
              0.2708308 = fieldWeight in 3002, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.0546875 = fieldNorm(doc=3002)
      0.5 = coord(1/2)
    
    Abstract
    The test of retrieval effectiveness performed on IBM's STAIRS and reported in 'Communications of the ACM' 10 years ago, continues to be cited frequently in the information retrieval literature. The reasons for the study's continuing pertinence to today's research are discussed, and the political, legal, and commercial aspects of the study are presented. In addition, the method of calculating recall that was used in the STAIRS study is discussed in some detail, especially how it reduces the 5 major types of uncertainty in recall estimations. It is also suggested that this method of recall estimation may serve as the basis for recall estimations that might be truly comparable between systems
    Source
    Journal of the American Society for Information Science. 47(1996) no.1, S.4-22
  9. Crestani, F.; Rijsbergen, C.J. van: Information retrieval by imaging (1996) 0.04
    0.04119421 = product of:
      0.08238842 = sum of:
        0.08238842 = sum of:
          0.03989153 = weight(_text_:research in 6967) [ClassicSimilarity], result of:
            0.03989153 = score(doc=6967,freq=4.0), product of:
              0.1491455 = queryWeight, product of:
                2.8529835 = idf(docFreq=6931, maxDocs=44218)
                0.05227703 = queryNorm
              0.2674672 = fieldWeight in 6967, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                2.8529835 = idf(docFreq=6931, maxDocs=44218)
                0.046875 = fieldNorm(doc=6967)
          0.042496894 = weight(_text_:22 in 6967) [ClassicSimilarity], result of:
            0.042496894 = score(doc=6967,freq=2.0), product of:
              0.18306525 = queryWeight, product of:
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.05227703 = queryNorm
              0.23214069 = fieldWeight in 6967, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.046875 = fieldNorm(doc=6967)
      0.5 = coord(1/2)
    
    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
  10. Sievert, M.E.; McKinin, E.J.: Why full-text misses some relevant documents : an analysis of documents not retrieved by CCML or MEDIS (1989) 0.04
    0.035352234 = product of:
      0.07070447 = sum of:
        0.07070447 = sum of:
          0.028207572 = weight(_text_:research in 3564) [ClassicSimilarity], result of:
            0.028207572 = score(doc=3564,freq=2.0), product of:
              0.1491455 = queryWeight, product of:
                2.8529835 = idf(docFreq=6931, maxDocs=44218)
                0.05227703 = queryNorm
              0.18912788 = fieldWeight in 3564, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                2.8529835 = idf(docFreq=6931, maxDocs=44218)
                0.046875 = fieldNorm(doc=3564)
          0.042496894 = weight(_text_:22 in 3564) [ClassicSimilarity], result of:
            0.042496894 = score(doc=3564,freq=2.0), product of:
              0.18306525 = queryWeight, product of:
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.05227703 = queryNorm
              0.23214069 = fieldWeight in 3564, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.046875 = fieldNorm(doc=3564)
      0.5 = coord(1/2)
    
    Abstract
    Searches conducted as part of the MEDLINE/Full-Text Research Project revealed that the full-text data bases of clinical medical journal articles (CCML (Comprehensive Core Medical Library) from BRS Information Technologies, and MEDIS from Mead Data Central) did not retrieve all the relevant citations. An analysis of the data indicated that 204 relevant citations were retrieved only by MEDLINE. A comparison of the strategies used on the full-text data bases with the text of the articles of these 204 citations revealed that 2 reasons contributed to these failure. The searcher often constructed a restrictive strategy which resulted in the loss of relevant documents; and as in other kinds of retrieval, the problems of natural language caused the loss of relevant documents.
    Date
    9. 1.1996 10:22:31
  11. King, D.W.: Blazing new trails : in celebration of an audacious career (2000) 0.03
    0.034328513 = product of:
      0.068657026 = sum of:
        0.068657026 = sum of:
          0.03324294 = weight(_text_:research in 1184) [ClassicSimilarity], result of:
            0.03324294 = score(doc=1184,freq=4.0), product of:
              0.1491455 = queryWeight, product of:
                2.8529835 = idf(docFreq=6931, maxDocs=44218)
                0.05227703 = queryNorm
              0.22288933 = fieldWeight in 1184, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                2.8529835 = idf(docFreq=6931, maxDocs=44218)
                0.0390625 = fieldNorm(doc=1184)
          0.03541408 = weight(_text_:22 in 1184) [ClassicSimilarity], result of:
            0.03541408 = score(doc=1184,freq=2.0), product of:
              0.18306525 = queryWeight, product of:
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.05227703 = queryNorm
              0.19345059 = fieldWeight in 1184, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.0390625 = fieldNorm(doc=1184)
      0.5 = coord(1/2)
    
    Abstract
    I had the distinct pleasure of working with Pauline Atherton (Cochrane) during the 1960s, a period that can be considered the heyday of automated information system design and evaluation in the United States. I first met Pauline at the 1962 American Documentation Institute annual meeting in North Hollywood, Florida. My company, Westat Research Analysts, had recently been awarded a contract by the U.S. Patent Office to provide statistical support for the design of experiments with automated information retrieval systems. I was asked to attend the meeting to learn more about information retrieval systems and to begin informing others of U.S. Patent Office activities in this area. At one session, Pauline and I questioned a speaker about the research that he presented. Pauline's questions concerned the logic of their approach and mine, the statistical aspects. After the session, she came over to talk to me and we began a professional and personal friendship that continues to this day. During the 1960s, Pauline was involved in several important information-retrieval projects including a series of studies for the American Institute of Physics, a dissertation examining the relevance of retrieved documents, and development and evaluation of an online information-retrieval system. I had the opportunity to work with Pauline and her colleagues an four of those projects and will briefly describe her work in the 1960s.
    Date
    22. 9.1997 19:16:05
  12. Belkin, N.J.: ¬An overview of results from Rutgers' investigations of interactive information retrieval (1998) 0.03
    0.029460195 = product of:
      0.05892039 = sum of:
        0.05892039 = sum of:
          0.023506312 = weight(_text_:research in 2339) [ClassicSimilarity], result of:
            0.023506312 = score(doc=2339,freq=2.0), product of:
              0.1491455 = queryWeight, product of:
                2.8529835 = idf(docFreq=6931, maxDocs=44218)
                0.05227703 = queryNorm
              0.15760657 = fieldWeight in 2339, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                2.8529835 = idf(docFreq=6931, maxDocs=44218)
                0.0390625 = fieldNorm(doc=2339)
          0.03541408 = weight(_text_:22 in 2339) [ClassicSimilarity], result of:
            0.03541408 = score(doc=2339,freq=2.0), product of:
              0.18306525 = queryWeight, product of:
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.05227703 = queryNorm
              0.19345059 = fieldWeight in 2339, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.0390625 = fieldNorm(doc=2339)
      0.5 = coord(1/2)
    
    Abstract
    Over the last 4 years, the Information Interaction Laboratory at Rutgers' School of communication, Information and Library Studies has performed a series of investigations concerned with various aspects of people's interactions with advanced information retrieval (IR) systems. We have benn especially concerned with understanding not just what people do, and why, and with what effect, but also with what they would like to do, and how they attempt to accomplish it, and with what difficulties. These investigations have led to some quite interesting conclusions about the nature and structure of people's interactions with information, about support for cooperative human-computer interaction in query reformulation, and about the value of visualization of search results for supporting various forms of interaction with information. In this discussion, I give an overview of the research program and its projects, present representative results from the projects, and discuss some implications of these results for support of subject searching in information retrieval systems
    Date
    22. 9.1997 19:16:05
  13. Wildemuth, B.; Freund, L.; Toms, E.G.: Untangling search task complexity and difficulty in the context of interactive information retrieval studies (2014) 0.03
    0.029460195 = product of:
      0.05892039 = sum of:
        0.05892039 = sum of:
          0.023506312 = weight(_text_:research in 1786) [ClassicSimilarity], result of:
            0.023506312 = score(doc=1786,freq=2.0), product of:
              0.1491455 = queryWeight, product of:
                2.8529835 = idf(docFreq=6931, maxDocs=44218)
                0.05227703 = queryNorm
              0.15760657 = fieldWeight in 1786, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                2.8529835 = idf(docFreq=6931, maxDocs=44218)
                0.0390625 = fieldNorm(doc=1786)
          0.03541408 = weight(_text_:22 in 1786) [ClassicSimilarity], result of:
            0.03541408 = score(doc=1786,freq=2.0), product of:
              0.18306525 = queryWeight, product of:
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.05227703 = queryNorm
              0.19345059 = fieldWeight in 1786, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.0390625 = fieldNorm(doc=1786)
      0.5 = coord(1/2)
    
    Abstract
    Purpose - One core element of interactive information retrieval (IIR) experiments is the assignment of search tasks. The purpose of this paper is to provide an analytical review of current practice in developing those search tasks to test, observe or control task complexity and difficulty. Design/methodology/approach - Over 100 prior studies of IIR were examined in terms of how each defined task complexity and/or difficulty (or related concepts) and subsequently interpreted those concepts in the development of the assigned search tasks. Findings - Search task complexity is found to include three dimensions: multiplicity of subtasks or steps, multiplicity of facets, and indeterminability. Search task difficulty is based on an interaction between the search task and the attributes of the searcher or the attributes of the search situation. The paper highlights the anomalies in our use of these two concepts, concluding with suggestions for future methodological research related to search task complexity and difficulty. Originality/value - By analyzing and synthesizing current practices, this paper provides guidance for future experiments in IIR that involve these two constructs.
    Date
    6. 4.2015 19:31:22
  14. Fuhr, N.; Niewelt, B.: ¬Ein Retrievaltest mit automatisch indexierten Dokumenten (1984) 0.02
    0.024789855 = product of:
      0.04957971 = sum of:
        0.04957971 = product of:
          0.09915942 = sum of:
            0.09915942 = weight(_text_:22 in 262) [ClassicSimilarity], result of:
              0.09915942 = score(doc=262,freq=2.0), product of:
                0.18306525 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.05227703 = queryNorm
                0.5416616 = fieldWeight in 262, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.109375 = fieldNorm(doc=262)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Date
    20.10.2000 12:22:23
  15. Tomaiuolo, N.G.; Parker, J.: Maximizing relevant retrieval : keyword and natural language searching (1998) 0.02
    0.024789855 = product of:
      0.04957971 = sum of:
        0.04957971 = product of:
          0.09915942 = sum of:
            0.09915942 = weight(_text_:22 in 6418) [ClassicSimilarity], result of:
              0.09915942 = score(doc=6418,freq=2.0), product of:
                0.18306525 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.05227703 = queryNorm
                0.5416616 = fieldWeight in 6418, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.109375 = fieldNorm(doc=6418)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Source
    Online. 22(1998) no.6, S.57-58
  16. Voorhees, E.M.; Harman, D.: Overview of the Sixth Text REtrieval Conference (TREC-6) (2000) 0.02
    0.024789855 = product of:
      0.04957971 = sum of:
        0.04957971 = product of:
          0.09915942 = sum of:
            0.09915942 = weight(_text_:22 in 6438) [ClassicSimilarity], result of:
              0.09915942 = score(doc=6438,freq=2.0), product of:
                0.18306525 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.05227703 = queryNorm
                0.5416616 = fieldWeight in 6438, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.109375 = fieldNorm(doc=6438)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Date
    11. 8.2001 16:22:19
  17. Dalrymple, P.W.: Retrieval by reformulation in two library catalogs : toward a cognitive model of searching behavior (1990) 0.02
    0.024789855 = product of:
      0.04957971 = sum of:
        0.04957971 = product of:
          0.09915942 = sum of:
            0.09915942 = weight(_text_:22 in 5089) [ClassicSimilarity], result of:
              0.09915942 = score(doc=5089,freq=2.0), product of:
                0.18306525 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.05227703 = queryNorm
                0.5416616 = fieldWeight in 5089, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.109375 = fieldNorm(doc=5089)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Date
    22. 7.2006 18:43:54
  18. Gilchrist, A.: Research and consultancy (1998) 0.02
    0.021024682 = product of:
      0.042049363 = sum of:
        0.042049363 = product of:
          0.08409873 = sum of:
            0.08409873 = weight(_text_:research in 1394) [ClassicSimilarity], result of:
              0.08409873 = score(doc=1394,freq=10.0), product of:
                0.1491455 = queryWeight, product of:
                  2.8529835 = idf(docFreq=6931, maxDocs=44218)
                  0.05227703 = queryNorm
                0.5638704 = fieldWeight in 1394, product of:
                  3.1622777 = tf(freq=10.0), with freq of:
                    10.0 = termFreq=10.0
                  2.8529835 = idf(docFreq=6931, maxDocs=44218)
                  0.0625 = fieldNorm(doc=1394)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Abstract
    State of the art review of literature published about research and consultancy in library and information science (LIS). Issues covered include: scope and definitions of what constitutes research and consultancy; funding of research and development; national LIS research and the funding agencies; electronic libraries; document delivery; multimedia document delivery; the Z39.50 standard for client server computer architecture, the Internet and WWW; electronic publishing; information retrieval; evaluation and evaluation techniques; the Text Retrieval Conferences (TREC); the user domain; management issues; decision support systems; information politics and organizational culture; and value for money issues
  19. Allan, J.; Callan, J.P.; Croft, W.B.; Ballesteros, L.; Broglio, J.; Xu, J.; Shu, H.: INQUERY at TREC-5 (1997) 0.02
    0.01770704 = product of:
      0.03541408 = sum of:
        0.03541408 = product of:
          0.07082816 = sum of:
            0.07082816 = weight(_text_:22 in 3103) [ClassicSimilarity], result of:
              0.07082816 = score(doc=3103,freq=2.0), product of:
                0.18306525 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.05227703 = queryNorm
                0.38690117 = fieldWeight in 3103, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.078125 = fieldNorm(doc=3103)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Date
    27. 2.1999 20:55:22
  20. 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) 0.02
    0.01770704 = product of:
      0.03541408 = sum of:
        0.03541408 = product of:
          0.07082816 = sum of:
            0.07082816 = weight(_text_:22 in 3107) [ClassicSimilarity], result of:
              0.07082816 = score(doc=3107,freq=2.0), product of:
                0.18306525 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.05227703 = queryNorm
                0.38690117 = fieldWeight in 3107, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.078125 = fieldNorm(doc=3107)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Date
    27. 2.1999 20:59:22

Languages

Types

  • a 129
  • s 7
  • m 4
  • r 3
  • el 2
  • More… Less…