Search (6 results, page 1 of 1)

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Abstract

Purpose - This paper sets out to examine the degree to which General Finnish Thesaurus (GFT) and FinMeSH cover various semantic expressions of medical concepts in patients' questions and physicians' answers concerning cardiovascular diseases. The former represents lay persons' information needs. Design/methodology/approach - A total of 50 question-answer pairs were collected in a medical web site. Concepts and their expressions (terms) with their semantic relations were identified in questions and answers. Findings - FinMeSH covered 65 per cent and GFT 41 per cent of all medical terms in texts. The expressions of patients and physicians matched better with FinMeSH than GFT regardless of the type of expression. The difference in favour of FinMeSH was typically about 25 per cent-units. Originality/value - The low fit with users' vocabularies makes GFT a poor tool for supporting searching, whereas the relatively high fit of FinMeSH suggests that it is a reasonable tool in assisting searching. Conclusions concerning the bridging of these two thesauri are discussed.

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Abstract

This study analyzes to which degree the question types addressed to a digital reference service run by a consortium of public libraries have changed between the Years 1999 and 2006. The data consist of representative samples of reference questions to a Finnish Ask a Librarian digital reference service in the years studied. Questions were classified based on a taxonomy refining earlier major taxonomies. The proportion of ready reference questions had increased from 33 to 45% whereas the proportion of subject-based research questions had decreased from 57 to 47%. Among the former, fact-finding questions had especially increased, and among the latter, topical search questions had decreased. These changes in the popularity of question types are likely related to the way people are searching on the Internet. It is concluded that the Internet has somewhat reduced the traditional role of public libraries in mediated topical searching.

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Abstract

This small-scale empirical study focuses an students' anticipated and assessed contribution of references retrieved during the preparation of research proposals. It explores how the expected contribution of types of information before searches differs from the assessed contribution of relevant references found by the types of information. Twenty-two psychology undergraduates searched the PsychINFO database for references at the initial and end stages of a seminar for preparing proposals. Data about their subject knowledge, search goals, and utility assessments were collected using several methods. They were asked to predict and assess the utility of information types provided by relevant references for the proposals. At the beginning of the process, they found fewer general types of information and more specific types of information than they expected. However, the students tended to accept references according to their expectations. By the end of the process, the expected importance of general information types declined and the importance of specific information types increased. At the end of the task, students became more proficient at recognizing the utility and topicality of references. They also became more critical in accepting found information to match their expectations.

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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

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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.