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101.
Psychological factors behind incidental information acquisition 总被引：1，自引：0，他引：1
Jannica Heinstrm 《Library & information science research》2007,28(4):579-594
This paper discusses incidental information acquisition in the light of psychological aspects. A theoretical introduction is followed by an account of three research projects where incidental information acquisition was related to personality traits, approaches to studying, and emotions. The respondents were grades 6–12, master's thesis, and mature library and information science (LIS) students representing an age range of 12–53 years. An energetic personality, high motivation, and positive emotionality were shown to enhance likelihood for incidental acquisition, while low motivation, stress, and insecurity reduced receptivity. 相似文献
102.
The compact disk (CD) player was one of the major audio innovations of the 1980s in the Netherlands. For studies of the temporal and social diffusion pattern of the CD player and the compact disks, both cultural and economic theories about innovations and music consumption are available. In this paper, these theories are combined in six working hypotheses concerning earlier adoption. The empirical analysis includes both time-invariant and time-varying variables and consumer characteristics. Event history analysis, the technique used in this article, enables one to incorporate these kinds of variables simultaneously in a dynamic model. Compared with the diffusion models usually employed by means of longitudinal analysis, event history analysis is a significant improvement in studying the development of the CD market in the Netherlands. 相似文献
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The effects of query structures and query expansion (QE) on retrieval performance were tested with a best match retrieval system (InQuery1). Query structure means the use of operators to express the relations between search keys. Six different structures were tested, representing strong structures (e.g., queries with facets or concepts identified) and weak structures (no concepts identified, a query is a bag of search keys). QE was based on concepts, which were first selected from a searching thesaurus, and then expanded by semantic relationships given in the thesaurus. The expansion levels were (a) no expansion, (b) a synonym expansion, (c) a narrower concept expansion, (d) an associative concept expansion, and (e) a cumulative expansion of all other expansions. With weak structures and Boolean structured queries, QE was not very effective. The best performance was achieved with a combination of a facet structure, where search keys within a facet were treated as instances of one search key (the SYN operator), and the largest expansion. 相似文献
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