Search (7 results, page 1 of 1)

Nahl, D.: User-centered revolution: 1995-2008 (2009) 0.08

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Date: 27. 8.2011 14:32:22
Footnote: Vgl.: http://www.tandfonline.com/doi/book/10.1081/E-ELIS3.

Nahl, D.: User-centered revolution: 1970-1995 (2009) 0.04

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Footnote: Vgl.: http://www.tandfonline.com/doi/book/10.1081/E-ELIS3.

Nahl, D.; Harada, V.H.: Composing Boolean search statements : self-confidence, concept analysis, search logic and errors (1996) 0.02
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Abstract

Describes an experiment in which secondary students from 6 schools on the island of Oahu, Hawaii, were tested for their ability to interpret and construct search statements in a presearch activity. Students read brief instructions on concept analysis, Boolean operators, and search statement format. One group used a worksheet. A 10item quiz tested students' knowledge of term selection and search logic and obtained self confidence ratings after answering each question. Search statements were analyzed according to a typology of search statement errors. On average, each student made 2 errors per search statement. Students with higher self confidence ratings had significantly higher scores on all measures
Nahl, D.: Ethnography of novices' first use of Web search engines : affective control in cognitive processing (1998) 0.02
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Abstract

Reports results of a study, conducted at Hawaii University, Department of Information and Computer Science, to understand the novide searchers' experience in learning to use a WWW search engine. Without prior searching instruction, undergraduate novives wrote structured self reports during their first session on a Web search engine. Users choose their own topics and followed written instructions that prompted them to describe thoughts and feelings during specified stages of the search; pre search formulation; search statement formulation; search strategy; and evaluation of the results. The sentences in the self reports were numbered and then coded according to their affective or cognitive function. The affective sentences reveal how users set goals and limit the scope of the cognitive operations. Search acts appear to be governed by an affective filter that organizes incoming information and provides criteria for ranking cognitive relevance to search goal. Content analysis identifies reasons users have for rating self confidence, stress level, satisfaction, usefulness, and success with future searches
Luo, M.M.; Nahl, D.: Let's Google : uncertainty and bilingual search (2019) 0.02
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Abstract

This study applies Kuhlthau's Information Search Process stage (ISP) model to understand bilingual users' Internet search experience. We conduct a quasi-field experiment with 30 bilingual searchers and the results suggested that the ISP model was applicable in studying searchers' information retrieval behavior in search tasks. The ISP model was applicable in studying searchers' information retrieval behavior in simple tasks. However, searchers' emotional responses differed from those of the ISP model for a complex task. By testing searchers using different search strategies, the results suggested that search engines with multilanguage search functions provide an advantage for bilingual searchers in the Internet's multilingual environment. The findings showed that when searchers used a search engine as a tool for problem solving, they might experience different feelings in each ISP stage than in searching for information for a term paper using a library. The results echo other research findings that indicate that information seeking is a multifaceted phenomenon.
Nahl, D.: Creating user-centered instructions for novice end-users (1999) 0.01
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Abstract

In response to the proliferation of information retrieval systems in academic libraries since the early 1980s, librarians have created many written search aids designed to help users learn how to search database systems. Written instructional material continues to increase in quantity and in importance with the rise of remote users and the advent of asynchronous distance learning. Since many users will have only written instructions to consult, it is crucial to determine the effectiveness of these materials. How useful are these instructions? Do people consult them? Do they help users make progress in their searches? There is a small but useful body of research on the effectiveness of both print and online search aids. This research points to the need to test materials on user groups. The findings from studies of novices using written instructions identify specific guidelines for creating effective materials.
Workman, T.E.; Fiszman, M.; Rindflesch, T.C.; Nahl, D.: Framing serendipitous information-seeking behavior for facilitating literature-based discovery : a proposed model (2014) 0.01
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Abstract

Several researchers have studied serendipitous knowledge discovery in information-seeking behavior. Electronic data in the form of semantic predications have a potential role in literature-based discovery, which can be guided by serendipitous knowledge discovery research findings. We sought to model information-seeking behavior within the context of serendipitous knowledge discovery by leveraging existing research. These efforts were done with an eye for a potential literature-based discovery application that utilizes semantic predications. We performed a literature search, reviewed the results, and applied the findings in developing a model for serendipitous knowledge discovery as an information-seeking behavior. The literature review indicated four important themes in serendipitous knowledge discovery: iteration, change or clarification, a seeker's prior knowledge, and the role of information organization and presentation. The Interaction Flow in Serendipitous Knowledge Discovery (IF-SKD) model includes these themes, and accommodates iterative, evolving search interests. Output can be presented in a manner to enhance short-term memory conceptualization and connections with prior knowledge. Although the IF-SKD model is currently a theoretical structure, its utility is demonstrated through replicating a literature-based discovery event, using a documented search method within the model's steps. The IF-SKD model can potentially serve as the foundation for future literature-based discovery applications.

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