Search (8 results, page 1 of 1)

0.025201846 = product of:
  0.06300461 = sum of:
    0.027660862 = weight(_text_:21 in 998) [ClassicSimilarity], result of:
      0.027660862 = score(doc=998,freq=2.0), product of:
        0.16162895 = queryWeight, product of:
          3.0979297 = idf(docFreq=5425, maxDocs=44218)
          0.052173212 = queryNorm
        0.17113805 = fieldWeight in 998, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          3.0979297 = idf(docFreq=5425, maxDocs=44218)
          0.0390625 = fieldNorm(doc=998)
    0.03534375 = weight(_text_:22 in 998) [ClassicSimilarity], result of:
      0.03534375 = score(doc=998,freq=2.0), product of:
        0.1827017 = queryWeight, product of:
          3.5018296 = idf(docFreq=3622, maxDocs=44218)
          0.052173212 = queryNorm
        0.19345059 = fieldWeight in 998, 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=998)
  0.4 = coord(2/5)

Abstract

The paper reports a longitudinal analysis of the topical and methodological development of Library and Information Science (LIS). Its focus is on the effects of researchers' disciplines on these developments. The study extends an earlier cross-sectional study (Vakkari et al., Journal of the Association for Information Science and Technology, 2022a, 73, 1706-1722) by a coordinated dataset representing a content analysis of articles published in 31 scholarly LIS journals in 1995, 2005, and 2015. It is novel in its coverage of authors' disciplines, topical and methodological aspects in a coordinated dataset spanning two decades thus allowing trend analysis. The findings include a shrinking trend in the share of LIS from 67 to 36% while Computer Science, and Business and Economics increase their share from 9 and 6% to 21 and 16%, respectively. The earlier cross-sectional study (Vakkari et al., Journal of the Association for Information Science and Technology, 2022a, 73, 1706-1722) for the year 2015 identified three topical clusters of LIS research, focusing on topical subfields, methodologies, and contributing disciplines. Correspondence analysis confirms their existence already in 1995 and traces their development through the decades. The contributing disciplines infuse their concepts, research questions, and approaches to LIS and may also subsume vital parts of LIS in their own structures of knowledge production.

Date

22. 6.2023 18:15:06

0.009996722 = product of:
  0.049983613 = sum of:
    0.049983613 = weight(_text_:22 in 1682) [ClassicSimilarity], result of:
      0.049983613 = score(doc=1682,freq=4.0), product of:
        0.1827017 = queryWeight, product of:
          3.5018296 = idf(docFreq=3622, maxDocs=44218)
          0.052173212 = queryNorm
        0.27358043 = fieldWeight in 1682, product of:
          2.0 = tf(freq=4.0), with freq of:
            4.0 = termFreq=4.0
          3.5018296 = idf(docFreq=3622, maxDocs=44218)
          0.0390625 = fieldNorm(doc=1682)
  0.2 = coord(1/5)

Abstract

This article focuses an analysing students' information needs in terms of conceptual understanding of the topic they propose to study and its consequences for the search process and outcome. The research subjects were 22 undergraduates of psychology attending a seminar for preparing a research proposal for a small empirical study. They were asked to make searches in the PsycINFO database for their task in the beginning and end of the seminar. A pre- and postsearch interview was conducted in both sessions. The students were asked to think aloud in the sessions. This was recorded, as were the transaction logs. The results show that during the preparation of research proposals different features of the students' conceptual structure were connected to the search success. Students' ability to cover their conceptual construct by query terms was the major feature affecting search success during the whole process. In the beginning also the number of concepts and the proportion of subconcepts in the construct contributed indirectly via search tactics to retrieving partly useful references. Students' ability to extract new query terms from retrieved items improved search results.

Date

19. 6.2003 17:22:33

0.009388409 = product of:
  0.04694204 = sum of:
    0.04694204 = weight(_text_:21 in 1732) [ClassicSimilarity], result of:
      0.04694204 = score(doc=1732,freq=4.0), product of:
        0.16162895 = queryWeight, product of:
          3.0979297 = idf(docFreq=5425, maxDocs=44218)
          0.052173212 = queryNorm
        0.2904309 = fieldWeight in 1732, product of:
          2.0 = tf(freq=4.0), with freq of:
            4.0 = termFreq=4.0
          3.0979297 = idf(docFreq=5425, maxDocs=44218)
          0.046875 = fieldNorm(doc=1732)
  0.2 = coord(1/5)

Date

21. 3.2008 14:06:21

0.0070687504 = product of:
  0.03534375 = sum of:
    0.03534375 = weight(_text_:22 in 1073) [ClassicSimilarity], result of:
      0.03534375 = score(doc=1073,freq=2.0), product of:
        0.1827017 = queryWeight, product of:
          3.5018296 = idf(docFreq=3622, maxDocs=44218)
          0.052173212 = queryNorm
        0.19345059 = fieldWeight in 1073, 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=1073)
  0.2 = coord(1/5)

Abstract

The study analyses how students' growing understanding of the topic and search experience were related to their choice of search tactics and terms while preparing a research proposal for a small empirical study. In addition to that, the findings of the study are used to test Vakkari's (2001) theory of task-based IR. The research subjects were 22 students of psychology attending a seminar for preparing the proposal. They made a search for their task in PsychINFO database at the beginning and end of the seminar. Data were collected in several ways. A pre- and post-search interview was conducted in both sessions. The students were asked to think aloud in the sessions. This was recorded as were the transaction logs. The results show that search experience was slightly related to the change of facets. Although the students' vocabulary of the topic grew generating an increased use of specific terms between the sessions, their use of search tactics and operators remained fairly constant. There was no correlation between the terms and tactics used and the total number of useful references found. By comparing these results with the findings of relevant earlier studies the conclusion was drawn that domain knowledge has an impact on searching assuming that users have a sufficient command of the system used. This implies that the tested theory of task-based IR is valid on condition that the searchers are experienced. It is suggested that the theory should be enriched by including search experience in its scope.

0.0070687504 = product of:
  0.03534375 = sum of:
    0.03534375 = weight(_text_:22 in 4573) [ClassicSimilarity], result of:
      0.03534375 = score(doc=4573,freq=2.0), product of:
        0.1827017 = queryWeight, product of:
          3.5018296 = idf(docFreq=3622, maxDocs=44218)
          0.052173212 = queryNorm
        0.19345059 = fieldWeight in 4573, 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=4573)
  0.2 = coord(1/5)

Date

9.12.2018 16:22:25

0.0066386065 = product of:
  0.033193033 = sum of:
    0.033193033 = weight(_text_:21 in 2850) [ClassicSimilarity], result of:
      0.033193033 = score(doc=2850,freq=2.0), product of:
        0.16162895 = queryWeight, product of:
          3.0979297 = idf(docFreq=5425, maxDocs=44218)
          0.052173212 = queryNorm
        0.20536566 = fieldWeight in 2850, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          3.0979297 = idf(docFreq=5425, maxDocs=44218)
          0.046875 = fieldNorm(doc=2850)
  0.2 = coord(1/5)

Date

17. 5.2009 21:07:38

0.0055321725 = product of:
  0.027660862 = sum of:
    0.027660862 = weight(_text_:21 in 3546) [ClassicSimilarity], result of:
      0.027660862 = score(doc=3546,freq=2.0), product of:
        0.16162895 = queryWeight, product of:
          3.0979297 = idf(docFreq=5425, maxDocs=44218)
          0.052173212 = queryNorm
        0.17113805 = fieldWeight in 3546, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          3.0979297 = idf(docFreq=5425, maxDocs=44218)
          0.0390625 = fieldNorm(doc=3546)
  0.2 = coord(1/5)

Abstract

The aim of this study is to compare (1) the semantic structures in lay persons' questions addressed to ask-an-expert service in the fields of health, nutrition and social services, and (2) to which extent lay persons' vocabularies are covered by a general thesaurus and a specific thesaurus in each of these fields. As representation of information needs 50 questions were selected concerning both health and nutrition, and 163 concerning social services. The concepts and their expressions in the questions were identified, and their semantic relations were observed and classified into equivalence, hierarchical and associative relations. The semantic structure of questions varied somewhat between the fields observed. Lay persons' expressions were covered most extensively in health, and least extensively in social services. Specific thesaurus covered more extensively expressions in health (65%) than general thesaurus (42%), whereas in nutrition there was no difference (33% vs. 32%), and in social services general thesaurus (21%) covered expressions somewhat better compared to specific thesaurus (15%). In terms of matching both specific and general thesaurus would provide searchers with reasonable support in term selection for query construction in health, but with limited assistance in nutrition and social services.

0.004425738 = product of:
  0.02212869 = sum of:
    0.02212869 = weight(_text_:21 in 1891) [ClassicSimilarity], result of:
      0.02212869 = score(doc=1891,freq=2.0), product of:
        0.16162895 = queryWeight, product of:
          3.0979297 = idf(docFreq=5425, maxDocs=44218)
          0.052173212 = queryNorm
        0.13691044 = fieldWeight in 1891, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          3.0979297 = idf(docFreq=5425, maxDocs=44218)
          0.03125 = fieldNorm(doc=1891)
  0.2 = coord(1/5)

Date

21. 3.2008 16:17:40