-
Bilal, D.; Wang, P.: Children's conceptual structures of science categories and the design of Web directories (2005)
0.06
0.064961776 = product of:
0.12992355 = sum of:
0.12992355 = product of:
0.2598471 = sum of:
0.2598471 = weight(_text_:maps in 4341) [ClassicSimilarity], result of:
0.2598471 = score(doc=4341,freq=12.0), product of:
0.28477904 = queryWeight, product of:
5.619245 = idf(docFreq=435, maxDocs=44218)
0.050679237 = queryNorm
0.9124516 = fieldWeight in 4341, product of:
3.4641016 = tf(freq=12.0), with freq of:
12.0 = termFreq=12.0
5.619245 = idf(docFreq=435, maxDocs=44218)
0.046875 = fieldNorm(doc=4341)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Abstract
- Eleven middle school children constructed hierarchical maps for two science categories selected from two Web directories, Yahooligans! and KidsClick! For each category, children constructed a pair of maps: one without links and one with links. Forty-tour maps were analyzed to identify similarities and differences. The structures of the maps were compared to the structures employed by the directories. Children were able to construct hierarchical maps and articulate the relationships among the concepts. At the global level (whole map), children's maps were not alike and did not match the structures of the Web directories. At the local levels (superordinate and subordinate), however, children shared similarities in the conceptual configurations, especially for the concrete concepts. For these concepts, substantial overlap was found between the children's structures and those employed in the directories. For the abstract concepts the configurations were diverse and did not match those in the directories. The findings of this study have impl!cations for design of systems that are more supportive of children's conceptual structures.
-
Large, A.; Beheshti, J.; Rahman, T.: Design criteria for children's Web portals : the users speak out (2002)
0.01
0.010299506 = product of:
0.020599011 = sum of:
0.020599011 = product of:
0.041198023 = sum of:
0.041198023 = weight(_text_:22 in 197) [ClassicSimilarity], result of:
0.041198023 = score(doc=197,freq=2.0), product of:
0.17747006 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.050679237 = 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
-
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
0.010299506 = product of:
0.020599011 = sum of:
0.020599011 = product of:
0.041198023 = sum of:
0.041198023 = weight(_text_:22 in 5228) [ClassicSimilarity], result of:
0.041198023 = score(doc=5228,freq=2.0), product of:
0.17747006 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.050679237 = 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.
-
Su, L.T.: ¬A comprehensive and systematic model of user evaluation of Web search engines : Il. An evaluation by undergraduates (2003)
0.01
0.008582922 = product of:
0.017165843 = sum of:
0.017165843 = product of:
0.034331687 = sum of:
0.034331687 = weight(_text_:22 in 2117) [ClassicSimilarity], result of:
0.034331687 = score(doc=2117,freq=2.0), product of:
0.17747006 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.050679237 = 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
-
Aloteibi, S.; Sanderson, M.: Analyzing geographic query reformulation : an exploratory study (2014)
0.01
0.008582922 = product of:
0.017165843 = sum of:
0.017165843 = product of:
0.034331687 = sum of:
0.034331687 = weight(_text_:22 in 1177) [ClassicSimilarity], result of:
0.034331687 = score(doc=1177,freq=2.0), product of:
0.17747006 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.050679237 = queryNorm
0.19345059 = fieldWeight in 1177, 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=1177)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 26. 1.2014 18:48:22
