Search (5 results, page 1 of 1)

0.006853395 = product of:
  0.04112037 = sum of:
    0.04112037 = weight(_text_:b in 3593) [ClassicSimilarity], result of:
      0.04112037 = score(doc=3593,freq=4.0), product of:
        0.14855953 = queryWeight, product of:
          3.542962 = idf(docFreq=3476, maxDocs=44218)
          0.041930884 = queryNorm
        0.2767939 = fieldWeight in 3593, product of:
          2.0 = tf(freq=4.0), with freq of:
            4.0 = termFreq=4.0
          3.542962 = idf(docFreq=3476, maxDocs=44218)
          0.0390625 = fieldNorm(doc=3593)
  0.16666667 = coord(1/6)

Abstract

We present the first systematic study of the influence of time on user judgements for rankings and relevance grades of web search engine results. The goal of this study is to evaluate the change in user assessment of search results and explore how users' judgements change. To this end, we conducted a large-scale user study with 86 participants who evaluated 2 different queries and 4 diverse result sets twice with an interval of 2 months. To analyze the results we investigate whether 2 types of patterns of user behavior from the theory of categorical thinking hold for the case of evaluation of search results: (a) coarseness and (b) locality. To quantify these patterns we devised 2 new measures of change in user judgements and distinguish between local (when users swap between close ranks and relevance values) and nonlocal changes. Two types of judgements were considered in this study: (a) relevance on a 4-point scale, and (b) ranking on a 10-point scale without ties. We found that users tend to change their judgements of the results over time in about 50% of cases for relevance and in 85% of cases for ranking. However, the majority of these changes were local.

0.0028405278 = product of:
  0.017043166 = sum of:
    0.017043166 = product of:
      0.03408633 = sum of:
        0.03408633 = weight(_text_:22 in 197) [ClassicSimilarity], result of:
          0.03408633 = score(doc=197,freq=2.0), product of:
            0.1468348 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.041930884 = 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)
  0.16666667 = coord(1/6)

Date

2. 6.2005 10:34:22

0.0028405278 = product of:
  0.017043166 = sum of:
    0.017043166 = product of:
      0.03408633 = sum of:
        0.03408633 = weight(_text_:22 in 5228) [ClassicSimilarity], result of:
          0.03408633 = score(doc=5228,freq=2.0), product of:
            0.1468348 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.041930884 = 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)
  0.16666667 = coord(1/6)

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.

0.0023671067 = product of:
  0.014202639 = sum of:
    0.014202639 = product of:
      0.028405279 = sum of:
        0.028405279 = weight(_text_:22 in 2117) [ClassicSimilarity], result of:
          0.028405279 = score(doc=2117,freq=2.0), product of:
            0.1468348 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.041930884 = 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)
  0.16666667 = coord(1/6)

Date

24. 1.2004 18:27:22

0.0023671067 = product of:
  0.014202639 = sum of:
    0.014202639 = product of:
      0.028405279 = sum of:
        0.028405279 = weight(_text_:22 in 1177) [ClassicSimilarity], result of:
          0.028405279 = score(doc=1177,freq=2.0), product of:
            0.1468348 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.041930884 = 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)
  0.16666667 = coord(1/6)

Date

26. 1.2014 18:48:22