-
Shiri, A.A.; Revie, C.: Query expansion behavior within a thesaurus-enhanced search environment : a user-centered evaluation (2006)
0.06
0.05782348 = product of:
0.11564696 = sum of:
0.11564696 = sum of:
0.08119681 = weight(_text_:90 in 56) [ClassicSimilarity], result of:
0.08119681 = score(doc=56,freq=2.0), product of:
0.2733978 = queryWeight, product of:
5.376119 = idf(docFreq=555, maxDocs=44218)
0.050854117 = queryNorm
0.29699144 = fieldWeight in 56, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.376119 = idf(docFreq=555, maxDocs=44218)
0.0390625 = fieldNorm(doc=56)
0.034450155 = weight(_text_:22 in 56) [ClassicSimilarity], result of:
0.034450155 = score(doc=56,freq=2.0), product of:
0.17808245 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.050854117 = queryNorm
0.19345059 = fieldWeight in 56, 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=56)
0.5 = coord(1/2)
- Abstract
- The study reported here investigated the query expansion behavior of end-users interacting with a thesaurus-enhanced search system on the Web. Two groups, namely academic staff and postgraduate students, were recruited into this study. Data were collected from 90 searches performed by 30 users using the OVID interface to the CAB abstracts database. Data-gathering techniques included questionnaires, screen capturing software, and interviews. The results presented here relate to issues of search-topic and search-term characteristics, number and types of expanded queries, usefulness of thesaurus terms, and behavioral differences between academic staff and postgraduate students in their interaction. The key conclusions drawn were that (a) academic staff chose more narrow and synonymous terms than did postgraduate students, who generally selected broader and related terms; (b) topic complexity affected users' interaction with the thesaurus in that complex topics required more query expansion and search term selection; (c) users' prior topic-search experience appeared to have a significant effect on their selection and evaluation of thesaurus terms; (d) in 50% of the searches where additional terms were suggested from the thesaurus, users stated that they had not been aware of the terms at the beginning of the search; this observation was particularly noticeable in the case of postgraduate students.
- Date
- 22. 7.2006 16:32:43
-
Kohlstädt, K.: Schüler suchen im Netz : Eine exemplarische Erhebung zu Erfahrungen und Problemen von Jugendlichen bei der Internetrecherche für schulische Zwecke (2004)
0.03
0.028418882 = product of:
0.056837764 = sum of:
0.056837764 = product of:
0.11367553 = sum of:
0.11367553 = weight(_text_:90 in 3713) [ClassicSimilarity], result of:
0.11367553 = score(doc=3713,freq=2.0), product of:
0.2733978 = queryWeight, product of:
5.376119 = idf(docFreq=555, maxDocs=44218)
0.050854117 = queryNorm
0.415788 = fieldWeight in 3713, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.376119 = idf(docFreq=555, maxDocs=44218)
0.0546875 = fieldNorm(doc=3713)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Abstract
- Nach Einführungen zu Jugend und Internet, Medienkompetenz und Lernen durch Medien, wird im praktischen Teil eine schriftliche Umfrage unter 90 Schülern eines Gymnasiums und einer Gesamtschule über deren Internetnutzung für schulische Zwecke analysiert. Suchpraxis, Einbindung des Internets in den schulischen Alltag, Unterschiede bei Geschlechtern und Schulformen werden besonders untersucht. Die Auswertung ergibt selbstbewußte Grundeinstellung der Schüler zum Internet, eher privat als schulisch genutzt, geschätzt wegen Schnelligkeit, Informationsmenge und Spaßfaktor bei Fixierung auf die Suchmaschine Google. Die Schüler geben sich meistens mit den gefundenen Ergebnissen zufrieden, stellen deren Qualität nicht weiter in Frage.
-
Shiri, A.A.; Revie, C.: End-user interaction with thesauri : an evaluation of cognitive overlap in search term selection (2004)
0.02
0.02435904 = product of:
0.04871808 = sum of:
0.04871808 = product of:
0.09743616 = sum of:
0.09743616 = weight(_text_:90 in 2658) [ClassicSimilarity], result of:
0.09743616 = score(doc=2658,freq=2.0), product of:
0.2733978 = queryWeight, product of:
5.376119 = idf(docFreq=555, maxDocs=44218)
0.050854117 = queryNorm
0.3563897 = fieldWeight in 2658, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.376119 = idf(docFreq=555, maxDocs=44218)
0.046875 = fieldNorm(doc=2658)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Abstract
- The use of thesaurus-enhanced search tools is an the increase. This paper provides an insight into end-users interaction with and perceptions of such tools. In particular the overlap between users' initial query formulation and thesaurus structures is investigated. This investigation involved the performance of genuine search tasks an the CAB Abstracts database by academic users in the domain of veterinary medicine. The perception of these users regarding the nature and usefulness of the terms suggested from the thesaurus during the search interaction is reported. The results indicated that around 80% of terms entered were matched either exactly or partially to thesaurus terms. Users found over 90% of the terms suggested to be close to their search topics and where terms were selected they indicated that around 50% were to support a 'narrowing down' activity. These findings have implications for the design of thesaurus-enhanced interfaces.
-
Scholle, U.: Kann ich Ihnen behilflich sein? : Erhebung am zentralen Auskunftsplatz der ULB Münster (2000)
0.02
0.024115108 = product of:
0.048230216 = sum of:
0.048230216 = product of:
0.09646043 = sum of:
0.09646043 = weight(_text_:22 in 7585) [ClassicSimilarity], result of:
0.09646043 = score(doc=7585,freq=2.0), product of:
0.17808245 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.050854117 = queryNorm
0.5416616 = fieldWeight in 7585, 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=7585)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 22. 1.2000 17:52:11
-
Branch, J.L.: Investigating the information-seeking process of adolescents : the value of using think alouds and think afters (2000)
0.02
0.024115108 = product of:
0.048230216 = sum of:
0.048230216 = product of:
0.09646043 = sum of:
0.09646043 = weight(_text_:22 in 3924) [ClassicSimilarity], result of:
0.09646043 = score(doc=3924,freq=2.0), product of:
0.17808245 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.050854117 = queryNorm
0.5416616 = fieldWeight in 3924, 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=3924)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Source
- Library and information science research. 22(2000) no.4, S.371-382
-
Yoo, E.-Y.; Robbins, L.S.: Understanding middle-aged women's health information seeking on the web : a theoretical approach (2008)
0.02
0.020670092 = product of:
0.041340183 = sum of:
0.041340183 = product of:
0.08268037 = sum of:
0.08268037 = weight(_text_:22 in 2973) [ClassicSimilarity], result of:
0.08268037 = score(doc=2973,freq=2.0), product of:
0.17808245 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.050854117 = queryNorm
0.46428138 = fieldWeight in 2973, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.09375 = fieldNorm(doc=2973)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 9. 2.2008 17:52:22
-
Tang, R.; Solomon, P.: Use of relevance criteria across stages of document evaluation : on the complementarity of experimental and naturalistic studies (2001)
0.02
0.016239362 = product of:
0.032478724 = sum of:
0.032478724 = product of:
0.06495745 = sum of:
0.06495745 = weight(_text_:90 in 5213) [ClassicSimilarity], result of:
0.06495745 = score(doc=5213,freq=2.0), product of:
0.2733978 = queryWeight, product of:
5.376119 = idf(docFreq=555, maxDocs=44218)
0.050854117 = queryNorm
0.23759314 = fieldWeight in 5213, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.376119 = idf(docFreq=555, maxDocs=44218)
0.03125 = fieldNorm(doc=5213)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Abstract
- Tang and Solomon, based upon their review of the history of topical and other than topical criteria in relevance evaluation, decide to look at a two stage model where judgements are first made on surrogate records and then on full document text to determine if a criteria shift takes place and if so in what manner and to what degree. Both a controlled experiment and a naturalistic study were used to study the staging of relevance judgement criteria. In the controlled environment 90 undergraduate Psychology students were instructed to choose papers that would help them meet an assignment from 20 preselected papers on broader topic that included that assigned. They first selected on the basis of citation and abstract, then read the papers, and in each process filled out a questionnaire on the importance of each of 15 criteria at each stage of the two-stage process. In the naturalistic study 9 Ph.D. Psychology students conducted literature searches to support their own research and were asked to think aloud while making their decisions from retrieved surrogates, and later filled out a questionnaire while reading those materials that they selected and then interviewed at the end of the process. Apparently understandability is important at both stages. Importance increased at stage two. Cognitive criteria do not all follow the same pattern across stages. The controlled group thought quality of information was most important in stage one and topicality most important in stage 2. In the naturalistic study topicality was most frequent for stage one and research structure for stage two. A classification of criteria by their functionality is suggested as a better approach. First a division as to whether a criterion is objectively associated with the document as opposed to being subjectively associated with a person's expectations; then a division based on primary (essential) or secondary (for assistance) status.
-
Gremett, P.: Utilizing a user's context to improve search results (2006)
0.01
0.013780061 = product of:
0.027560122 = sum of:
0.027560122 = product of:
0.055120245 = sum of:
0.055120245 = weight(_text_:22 in 5299) [ClassicSimilarity], result of:
0.055120245 = score(doc=5299,freq=2.0), product of:
0.17808245 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.050854117 = queryNorm
0.30952093 = fieldWeight in 5299, 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=5299)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 22. 7.2006 18:17:44
-
Schneider, R.: OPACs, Benutzer und das Web (2009)
0.01
0.013780061 = product of:
0.027560122 = sum of:
0.027560122 = product of:
0.055120245 = sum of:
0.055120245 = weight(_text_:22 in 2905) [ClassicSimilarity], result of:
0.055120245 = score(doc=2905,freq=2.0), product of:
0.17808245 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.050854117 = queryNorm
0.30952093 = fieldWeight in 2905, 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=2905)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 22. 2.2009 18:50:43
-
Moulaison, H.L.: OPAC queries at a medium-sized academic library : a transaction log analysis (2008)
0.01
0.012057554 = product of:
0.024115108 = sum of:
0.024115108 = product of:
0.048230216 = sum of:
0.048230216 = weight(_text_:22 in 3599) [ClassicSimilarity], result of:
0.048230216 = score(doc=3599,freq=2.0), product of:
0.17808245 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.050854117 = queryNorm
0.2708308 = fieldWeight in 3599, 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=3599)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 10. 9.2000 17:38:22
-
Agosto, D.E.: Bounded rationality and satisficing in young people's Web-based decision making (2002)
0.01
0.010335046 = product of:
0.020670092 = sum of:
0.020670092 = product of:
0.041340183 = sum of:
0.041340183 = weight(_text_:22 in 177) [ClassicSimilarity], result of:
0.041340183 = score(doc=177,freq=2.0), product of:
0.17808245 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.050854117 = queryNorm
0.23214069 = fieldWeight in 177, 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=177)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Abstract
- This study investigated Simon's behavioral decisionmaking theories of bounded rationality and satisficing in relation to young people's decision making in the World Wide Web, and considered the role of personal preferences in Web-based decisions. It employed a qualitative research methodology involving group interviews with 22 adolescent females. Data analysis took the form of iterative pattern coding using QSR NUD*IST Vivo qualitative data analysis software. Data analysis revealed that the study participants did operate within the limits of bounded rationality. These limits took the form of time constraints, information overload, and physical constraints. Data analysis also uncovered two major satisficing behaviors-reduction and termination. Personal preference was found to play a major role in Web site evaluation in the areas of graphic/multimedia and subject content preferences. This study has related implications for Web site designers and for adult intermediaries who work with young people and the Web
-
Large, A.; Beheshti, J.; Rahman, T.: Design criteria for children's Web portals : the users speak out (2002)
0.01
0.010335046 = product of:
0.020670092 = sum of:
0.020670092 = product of:
0.041340183 = sum of:
0.041340183 = weight(_text_:22 in 197) [ClassicSimilarity], result of:
0.041340183 = score(doc=197,freq=2.0), product of:
0.17808245 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.050854117 = queryNorm
0.23214069 = fieldWeight in 197, 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=197)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 2. 6.2005 10:34:22
-
Fidel, R.: ¬The user-centered approach (2000)
0.01
0.010335046 = product of:
0.020670092 = sum of:
0.020670092 = product of:
0.041340183 = sum of:
0.041340183 = weight(_text_:22 in 917) [ClassicSimilarity], result of:
0.041340183 = score(doc=917,freq=2.0), product of:
0.17808245 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.050854117 = queryNorm
0.23214069 = fieldWeight in 917, 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=917)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 22. 9.1997 19:16:05
-
Bilal, D.: Children's use of the Yahooligans! Web search engine : III. Cognitive and physical behaviors on fully self-generated search tasks (2002)
0.01
0.010335046 = product of:
0.020670092 = sum of:
0.020670092 = product of:
0.041340183 = sum of:
0.041340183 = weight(_text_:22 in 5228) [ClassicSimilarity], result of:
0.041340183 = score(doc=5228,freq=2.0), product of:
0.17808245 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.050854117 = queryNorm
0.23214069 = fieldWeight in 5228, 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=5228)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Abstract
- Bilal, in this third part of her Yahooligans! study looks at children's performance with self-generated search tasks, as compared to previously assigned search tasks looking for differences in success, cognitive behavior, physical behavior, and task preference. Lotus ScreenCam was used to record interactions and post search interviews to record impressions. The subjects, the same 22 seventh grade children in the previous studies, generated topics of interest that were mediated with the researcher into more specific topics where necessary. Fifteen usable sessions form the basis of the study. Eleven children were successful in finding information, a rate of 73% compared to 69% in assigned research questions, and 50% in assigned fact-finding questions. Eighty-seven percent began using one or two keyword searches. Spelling was a problem. Successful children made fewer keyword searches and the number of search moves averaged 5.5 as compared to 2.4 on the research oriented task and 3.49 on the factual. Backtracking and looping were common. The self-generated task was preferred by 47% of the subjects.
-
Kim, J.: Describing and predicting information-seeking behavior on the Web (2009)
0.01
0.010335046 = product of:
0.020670092 = sum of:
0.020670092 = product of:
0.041340183 = sum of:
0.041340183 = weight(_text_:22 in 2747) [ClassicSimilarity], result of:
0.041340183 = score(doc=2747,freq=2.0), product of:
0.17808245 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.050854117 = queryNorm
0.23214069 = fieldWeight in 2747, 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=2747)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 22. 3.2009 18:54:15
-
Wildemuth, B.M.: Effective methods for studying information seeking and use : Introduction and overview (2002)
0.01
0.008612539 = product of:
0.017225077 = sum of:
0.017225077 = product of:
0.034450155 = sum of:
0.034450155 = weight(_text_:22 in 1257) [ClassicSimilarity], result of:
0.034450155 = score(doc=1257,freq=2.0), product of:
0.17808245 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.050854117 = queryNorm
0.19345059 = fieldWeight in 1257, 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=1257)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 20. 1.2003 9:37:22
-
Su, L.T.: ¬A comprehensive and systematic model of user evaluation of Web search engines : Il. An evaluation by undergraduates (2003)
0.01
0.008612539 = product of:
0.017225077 = sum of:
0.017225077 = product of:
0.034450155 = sum of:
0.034450155 = weight(_text_:22 in 2117) [ClassicSimilarity], result of:
0.034450155 = score(doc=2117,freq=2.0), product of:
0.17808245 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.050854117 = queryNorm
0.19345059 = fieldWeight in 2117, 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=2117)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 24. 1.2004 18:27:22
-
Aula, A.; Nordhausen, K.: Modeling successful performance in Web searching (2006)
0.01
0.008612539 = product of:
0.017225077 = sum of:
0.017225077 = product of:
0.034450155 = sum of:
0.034450155 = weight(_text_:22 in 6117) [ClassicSimilarity], result of:
0.034450155 = score(doc=6117,freq=2.0), product of:
0.17808245 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.050854117 = queryNorm
0.19345059 = fieldWeight in 6117, 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=6117)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Abstract
- Several previous studies have measured differences in the information search success of novices and experts. However, the definitions of novices and experts have varied greatly between the studies, and so have the measures used for search success. Instead of dividing the searchers into different groups based on their expertise, we chose to model search success with task completion speed, TCS. Towards this goal, 22 participants performed three fact-finding tasks and two broader tasks in an observational user study. In our model, there were two variables related to the Web experience of the participants. Other variables included, for example, the speed of query iteration, the length of the queries, the proportion of precise queries, and the speed of evaluating result documents. Our results showed that the variables related to Web experience had expected effects on TCS. The increase in the years of Web use was related to improvement in TCS in the broader tasks, whereas the less frequent Web use was related to a decrease in TCS in the fact-finding tasks. Other variables having significant effects on TCS in either of the task types were the speed of composing queries, the average number of query terms per query, the proportion of precise queries, and the participants' own evaluation of their search skills. In addition to the statistical models, we present several qualitative findings of the participants' search strategies. These results give valuable insight into the successful strategies in Web search beyond the previous knowledge of the expert-novice differences.
-
Borgman, C.L.; Smart, L.J.; Millwood, K.A.; Finley, J.R.; Champeny, L.; Gilliland, A.J.; Leazer, G.H.: Comparing faculty information seeking in teaching and research : implications for the design of digital libraries (2005)
0.01
0.0068900306 = product of:
0.013780061 = sum of:
0.013780061 = product of:
0.027560122 = sum of:
0.027560122 = weight(_text_:22 in 3231) [ClassicSimilarity], result of:
0.027560122 = score(doc=3231,freq=2.0), product of:
0.17808245 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.050854117 = queryNorm
0.15476047 = fieldWeight in 3231, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.03125 = fieldNorm(doc=3231)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 3. 6.2005 20:40:22
