Document (#40540)

Author
Bornmann, L.
Title
Is collaboration among scientists related to the citation impact of papers because their quality increases with collaboration? : an analysis based on data from F1000Prime and normalized citation scores
Source
Journal of the Association for Information Science and Technology. 68(2017) no.4, S.1036-1047
Year
2017
Abstract
In recent years, the relationship of collaboration among scientists and the citation impact of papers have been frequently investigated. Most of the studies show that the two variables are closely related: An increasing collaboration activity (measured in terms of number of authors, number of affiliations, and number of countries) is associated with an increased citation impact. However, it is not clear whether the increased citation impact is based on the higher quality of papers that profit from more than one scientist giving expert input or other (citation-specific) factors. Thus, the current study addresses this question by using two comprehensive data sets with publications (in the biomedical area) including quality assessments by experts (F1000Prime member scores) and citation data for the publications. The study is based on more than 15,000 papers. Robust regression models are used to investigate the relationship between number of authors, number of affiliations, and number of countries, respectively, and citation impact-controlling for the papers' quality (measured by F1000Prime expert ratings). The results point out that the effect of collaboration activities on impact is largely independent of the papers' quality. The citation advantage is apparently not quality related; citation-specific factors (e.g., self-citations) seem to be important here.
Content
Vgl.: http://onlinelibrary.wiley.com/doi/10.1002/asi.23728/full.
Theme
Informetrie

Similar documents (author)

  1. Bornmann, L.: Complex tasks and simple solutions : the use of heuristics in the evaluation of research (2015) 4.73
    4.7310953 = sum of:
      4.7310953 = weight(author_txt:bornmann in 8911) [ClassicSimilarity], result of:
        4.7310953 = fieldWeight in 8911, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          7.5697527 = idf(docFreq=61, maxDocs=44218)
          0.625 = fieldNorm(doc=8911)
    
  2. Bornmann, L.: What is societal impact of research and how can it be assessed? : a literature survey (2013) 4.73
    4.7310953 = sum of:
      4.7310953 = weight(author_txt:bornmann in 606) [ClassicSimilarity], result of:
        4.7310953 = fieldWeight in 606, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          7.5697527 = idf(docFreq=61, maxDocs=44218)
          0.625 = fieldNorm(doc=606)
    
  3. Bornmann, L.: How to analyze percentile citation impact data meaningfully in bibliometrics : the statistical analysis of distributions, percentile rank classes, and top-cited papers (2013) 4.73
    4.7310953 = sum of:
      4.7310953 = weight(author_txt:bornmann in 656) [ClassicSimilarity], result of:
        4.7310953 = fieldWeight in 656, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          7.5697527 = idf(docFreq=61, maxDocs=44218)
          0.625 = fieldNorm(doc=656)
    
  4. Bornmann, L.: Lässt sich die Qualität von Forschung messen? (2013) 4.73
    4.7310953 = sum of:
      4.7310953 = weight(author_txt:bornmann in 928) [ClassicSimilarity], result of:
        4.7310953 = fieldWeight in 928, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          7.5697527 = idf(docFreq=61, maxDocs=44218)
          0.625 = fieldNorm(doc=928)
    
  5. Bornmann, L.: On the function of university rankings (2014) 4.73
    4.7310953 = sum of:
      4.7310953 = weight(author_txt:bornmann in 1188) [ClassicSimilarity], result of:
        4.7310953 = fieldWeight in 1188, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          7.5697527 = idf(docFreq=61, maxDocs=44218)
          0.625 = fieldNorm(doc=1188)
    

Similar documents (content)

  1. Thelwall, M.; Maflahi, N.: Are scholarly articles disproportionately read in their own country? : An analysis of mendeley readers (2015) 0.45
    0.45465526 = sum of:
      0.45465526 = product of:
        1.0333074 = sum of:
          0.020382177 = weight(abstract_txt:specific in 1850) [ClassicSimilarity], result of:
            0.020382177 = score(doc=1850,freq=1.0), product of:
              0.07559207 = queryWeight, product of:
                1.1075853 = boost
                4.314141 = idf(docFreq=1607, maxDocs=44218)
                0.015819937 = queryNorm
              0.2696338 = fieldWeight in 1850, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.314141 = idf(docFreq=1607, maxDocs=44218)
                0.0625 = fieldNorm(doc=1850)
          0.04416386 = weight(abstract_txt:authors in 1850) [ClassicSimilarity], result of:
            0.04416386 = score(doc=1850,freq=3.0), product of:
              0.08776341 = queryWeight, product of:
                1.1934268 = boost
                4.648501 = idf(docFreq=1150, maxDocs=44218)
                0.015819937 = queryNorm
              0.50321496 = fieldWeight in 1850, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                4.648501 = idf(docFreq=1150, maxDocs=44218)
                0.0625 = fieldNorm(doc=1850)
          0.012336282 = weight(abstract_txt:based in 1850) [ClassicSimilarity], result of:
            0.012336282 = score(doc=1850,freq=1.0), product of:
              0.06191499 = queryWeight, product of:
                1.2276727 = boost
                3.1879277 = idf(docFreq=4958, maxDocs=44218)
                0.015819937 = queryNorm
              0.19924548 = fieldWeight in 1850, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.1879277 = idf(docFreq=4958, maxDocs=44218)
                0.0625 = fieldNorm(doc=1850)
          0.030995846 = weight(abstract_txt:factors in 1850) [ClassicSimilarity], result of:
            0.030995846 = score(doc=1850,freq=1.0), product of:
              0.09996428 = queryWeight, product of:
                1.2736834 = boost
                4.9611073 = idf(docFreq=841, maxDocs=44218)
                0.015819937 = queryNorm
              0.3100692 = fieldWeight in 1850, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.9611073 = idf(docFreq=841, maxDocs=44218)
                0.0625 = fieldNorm(doc=1850)
          0.052506533 = weight(abstract_txt:publications in 1850) [ClassicSimilarity], result of:
            0.052506533 = score(doc=1850,freq=2.0), product of:
              0.1127478 = queryWeight, product of:
                1.3526739 = boost
                5.268782 = idf(docFreq=618, maxDocs=44218)
                0.015819937 = queryNorm
              0.46569893 = fieldWeight in 1850, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                5.268782 = idf(docFreq=618, maxDocs=44218)
                0.0625 = fieldNorm(doc=1850)
          0.0776324 = weight(abstract_txt:countries in 1850) [ClassicSimilarity], result of:
            0.0776324 = score(doc=1850,freq=3.0), product of:
              0.1278294 = queryWeight, product of:
                1.4403049 = boost
                5.6101127 = idf(docFreq=439, maxDocs=44218)
                0.015819937 = queryNorm
              0.6073125 = fieldWeight in 1850, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                5.6101127 = idf(docFreq=439, maxDocs=44218)
                0.0625 = fieldNorm(doc=1850)
          0.28479522 = weight(abstract_txt:affiliations in 1850) [ClassicSimilarity], result of:
            0.28479522 = score(doc=1850,freq=3.0), product of:
              0.30405858 = queryWeight, product of:
                2.2213535 = boost
                8.652365 = idf(docFreq=20, maxDocs=44218)
                0.015819937 = queryNorm
              0.9366459 = fieldWeight in 1850, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                8.652365 = idf(docFreq=20, maxDocs=44218)
                0.0625 = fieldNorm(doc=1850)
          0.0735376 = weight(abstract_txt:impact in 1850) [ClassicSimilarity], result of:
            0.0735376 = score(doc=1850,freq=1.0), product of:
              0.25646174 = queryWeight, product of:
                3.5335479 = boost
                4.5878253 = idf(docFreq=1222, maxDocs=44218)
                0.015819937 = queryNorm
              0.28673908 = fieldWeight in 1850, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.5878253 = idf(docFreq=1222, maxDocs=44218)
                0.0625 = fieldNorm(doc=1850)
          0.10848313 = weight(abstract_txt:quality in 1850) [ClassicSimilarity], result of:
            0.10848313 = score(doc=1850,freq=2.0), product of:
              0.26378357 = queryWeight, product of:
                3.5836334 = boost
                4.6528544 = idf(docFreq=1145, maxDocs=44218)
                0.015819937 = queryNorm
              0.4112581 = fieldWeight in 1850, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.6528544 = idf(docFreq=1145, maxDocs=44218)
                0.0625 = fieldNorm(doc=1850)
          0.17945156 = weight(abstract_txt:collaboration in 1850) [ClassicSimilarity], result of:
            0.17945156 = score(doc=1850,freq=2.0), product of:
              0.3471981 = queryWeight, product of:
                3.7531657 = boost
                5.8475623 = idf(docFreq=346, maxDocs=44218)
                0.015819937 = queryNorm
              0.5168564 = fieldWeight in 1850, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                5.8475623 = idf(docFreq=346, maxDocs=44218)
                0.0625 = fieldNorm(doc=1850)
          0.14902279 = weight(abstract_txt:citation in 1850) [ClassicSimilarity], result of:
            0.14902279 = score(doc=1850,freq=1.0), product of:
              0.48693123 = queryWeight, product of:
                6.2857614 = boost
                4.896717 = idf(docFreq=897, maxDocs=44218)
                0.015819937 = queryNorm
              0.30604482 = fieldWeight in 1850, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.896717 = idf(docFreq=897, maxDocs=44218)
                0.0625 = fieldNorm(doc=1850)
        0.44 = coord(11/25)
    
  2. Moed, H.F.: ¬The effect of "open access" on citation impact : an analysis of ArXiv's condensed matter section (2007) 0.41
    0.41165242 = sum of:
      0.41165242 = product of:
        1.029131 = sum of:
          0.01500096 = weight(abstract_txt:than in 621) [ClassicSimilarity], result of:
            0.01500096 = score(doc=621,freq=1.0), product of:
              0.061620027 = queryWeight, product of:
                3.8950868 = idf(docFreq=2444, maxDocs=44218)
                0.015819937 = queryNorm
              0.24344292 = fieldWeight in 621, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.8950868 = idf(docFreq=2444, maxDocs=44218)
                0.0625 = fieldNorm(doc=621)
          0.025498018 = weight(abstract_txt:authors in 621) [ClassicSimilarity], result of:
            0.025498018 = score(doc=621,freq=1.0), product of:
              0.08776341 = queryWeight, product of:
                1.1934268 = boost
                4.648501 = idf(docFreq=1150, maxDocs=44218)
                0.015819937 = queryNorm
              0.2905313 = fieldWeight in 621, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.648501 = idf(docFreq=1150, maxDocs=44218)
                0.0625 = fieldNorm(doc=621)
          0.030995846 = weight(abstract_txt:factors in 621) [ClassicSimilarity], result of:
            0.030995846 = score(doc=621,freq=1.0), product of:
              0.09996428 = queryWeight, product of:
                1.2736834 = boost
                4.9611073 = idf(docFreq=841, maxDocs=44218)
                0.015819937 = queryNorm
              0.3100692 = fieldWeight in 621, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.9611073 = idf(docFreq=841, maxDocs=44218)
                0.0625 = fieldNorm(doc=621)
          0.019998062 = weight(abstract_txt:data in 621) [ClassicSimilarity], result of:
            0.019998062 = score(doc=621,freq=2.0), product of:
              0.06781434 = queryWeight, product of:
                1.2848294 = boost
                3.3363478 = idf(docFreq=4274, maxDocs=44218)
                0.015819937 = queryNorm
              0.29489428 = fieldWeight in 621, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.3363478 = idf(docFreq=4274, maxDocs=44218)
                0.0625 = fieldNorm(doc=621)
          0.06498955 = weight(abstract_txt:measured in 621) [ClassicSimilarity], result of:
            0.06498955 = score(doc=621,freq=1.0), product of:
              0.16375889 = queryWeight, product of:
                1.6302023 = boost
                6.3497796 = idf(docFreq=209, maxDocs=44218)
                0.015819937 = queryNorm
              0.39686123 = fieldWeight in 621, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.3497796 = idf(docFreq=209, maxDocs=44218)
                0.0625 = fieldNorm(doc=621)
          0.0537495 = weight(abstract_txt:number in 621) [ClassicSimilarity], result of:
            0.0537495 = score(doc=621,freq=1.0), product of:
              0.20809704 = queryWeight, product of:
                3.1829708 = boost
                4.132649 = idf(docFreq=1927, maxDocs=44218)
                0.015819937 = queryNorm
              0.25829056 = fieldWeight in 621, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.132649 = idf(docFreq=1927, maxDocs=44218)
                0.0625 = fieldNorm(doc=621)
          0.12737086 = weight(abstract_txt:impact in 621) [ClassicSimilarity], result of:
            0.12737086 = score(doc=621,freq=3.0), product of:
              0.25646174 = queryWeight, product of:
                3.5335479 = boost
                4.5878253 = idf(docFreq=1222, maxDocs=44218)
                0.015819937 = queryNorm
              0.49664664 = fieldWeight in 621, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                4.5878253 = idf(docFreq=1222, maxDocs=44218)
                0.0625 = fieldNorm(doc=621)
          0.13286416 = weight(abstract_txt:quality in 621) [ClassicSimilarity], result of:
            0.13286416 = score(doc=621,freq=3.0), product of:
              0.26378357 = queryWeight, product of:
                3.5836334 = boost
                4.6528544 = idf(docFreq=1145, maxDocs=44218)
                0.015819937 = queryNorm
              0.50368625 = fieldWeight in 621, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                4.6528544 = idf(docFreq=1145, maxDocs=44218)
                0.0625 = fieldNorm(doc=621)
          0.1936343 = weight(abstract_txt:papers in 621) [ClassicSimilarity], result of:
            0.1936343 = score(doc=621,freq=3.0), product of:
              0.33907625 = queryWeight, product of:
                4.0630145 = boost
                5.2752647 = idf(docFreq=614, maxDocs=44218)
                0.015819937 = queryNorm
              0.5710642 = fieldWeight in 621, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                5.2752647 = idf(docFreq=614, maxDocs=44218)
                0.0625 = fieldNorm(doc=621)
          0.3650298 = weight(abstract_txt:citation in 621) [ClassicSimilarity], result of:
            0.3650298 = score(doc=621,freq=6.0), product of:
              0.48693123 = queryWeight, product of:
                6.2857614 = boost
                4.896717 = idf(docFreq=897, maxDocs=44218)
                0.015819937 = queryNorm
              0.7496537 = fieldWeight in 621, product of:
                2.4494898 = tf(freq=6.0), with freq of:
                  6.0 = termFreq=6.0
                4.896717 = idf(docFreq=897, maxDocs=44218)
                0.0625 = fieldNorm(doc=621)
        0.4 = coord(10/25)
    
  3. Sin, S.-C.J.: International coauthorship and citation impact : a bibliometric study of six LIS journals, 1980-2008 (2011) 0.41
    0.4053474 = sum of:
      0.4053474 = product of:
        1.0133685 = sum of:
          0.01500096 = weight(abstract_txt:than in 4753) [ClassicSimilarity], result of:
            0.01500096 = score(doc=4753,freq=1.0), product of:
              0.061620027 = queryWeight, product of:
                3.8950868 = idf(docFreq=2444, maxDocs=44218)
                0.015819937 = queryNorm
              0.24344292 = fieldWeight in 4753, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.8950868 = idf(docFreq=2444, maxDocs=44218)
                0.0625 = fieldNorm(doc=4753)
          0.050996035 = weight(abstract_txt:authors in 4753) [ClassicSimilarity], result of:
            0.050996035 = score(doc=4753,freq=4.0), product of:
              0.08776341 = queryWeight, product of:
                1.1934268 = boost
                4.648501 = idf(docFreq=1150, maxDocs=44218)
                0.015819937 = queryNorm
              0.5810626 = fieldWeight in 4753, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                4.648501 = idf(docFreq=1150, maxDocs=44218)
                0.0625 = fieldNorm(doc=4753)
          0.012336282 = weight(abstract_txt:based in 4753) [ClassicSimilarity], result of:
            0.012336282 = score(doc=4753,freq=1.0), product of:
              0.06191499 = queryWeight, product of:
                1.2276727 = boost
                3.1879277 = idf(docFreq=4958, maxDocs=44218)
                0.015819937 = queryNorm
              0.19924548 = fieldWeight in 4753, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.1879277 = idf(docFreq=4958, maxDocs=44218)
                0.0625 = fieldNorm(doc=4753)
          0.043834746 = weight(abstract_txt:factors in 4753) [ClassicSimilarity], result of:
            0.043834746 = score(doc=4753,freq=2.0), product of:
              0.09996428 = queryWeight, product of:
                1.2736834 = boost
                4.9611073 = idf(docFreq=841, maxDocs=44218)
                0.015819937 = queryNorm
              0.43850407 = fieldWeight in 4753, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.9611073 = idf(docFreq=841, maxDocs=44218)
                0.0625 = fieldNorm(doc=4753)
          0.052506533 = weight(abstract_txt:publications in 4753) [ClassicSimilarity], result of:
            0.052506533 = score(doc=4753,freq=2.0), product of:
              0.1127478 = queryWeight, product of:
                1.3526739 = boost
                5.268782 = idf(docFreq=618, maxDocs=44218)
                0.015819937 = queryNorm
              0.46569893 = fieldWeight in 4753, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                5.268782 = idf(docFreq=618, maxDocs=44218)
                0.0625 = fieldNorm(doc=4753)
          0.0537495 = weight(abstract_txt:number in 4753) [ClassicSimilarity], result of:
            0.0537495 = score(doc=4753,freq=1.0), product of:
              0.20809704 = queryWeight, product of:
                3.1829708 = boost
                4.132649 = idf(docFreq=1927, maxDocs=44218)
                0.015819937 = queryNorm
              0.25829056 = fieldWeight in 4753, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.132649 = idf(docFreq=1927, maxDocs=44218)
                0.0625 = fieldNorm(doc=4753)
          0.0735376 = weight(abstract_txt:impact in 4753) [ClassicSimilarity], result of:
            0.0735376 = score(doc=4753,freq=1.0), product of:
              0.25646174 = queryWeight, product of:
                3.5335479 = boost
                4.5878253 = idf(docFreq=1222, maxDocs=44218)
                0.015819937 = queryNorm
              0.28673908 = fieldWeight in 4753, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.5878253 = idf(docFreq=1222, maxDocs=44218)
                0.0625 = fieldNorm(doc=4753)
          0.17945156 = weight(abstract_txt:collaboration in 4753) [ClassicSimilarity], result of:
            0.17945156 = score(doc=4753,freq=2.0), product of:
              0.3471981 = queryWeight, product of:
                3.7531657 = boost
                5.8475623 = idf(docFreq=346, maxDocs=44218)
                0.015819937 = queryNorm
              0.5168564 = fieldWeight in 4753, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                5.8475623 = idf(docFreq=346, maxDocs=44218)
                0.0625 = fieldNorm(doc=4753)
          0.27384025 = weight(abstract_txt:papers in 4753) [ClassicSimilarity], result of:
            0.27384025 = score(doc=4753,freq=6.0), product of:
              0.33907625 = queryWeight, product of:
                4.0630145 = boost
                5.2752647 = idf(docFreq=614, maxDocs=44218)
                0.015819937 = queryNorm
              0.8076067 = fieldWeight in 4753, product of:
                2.4494898 = tf(freq=6.0), with freq of:
                  6.0 = termFreq=6.0
                5.2752647 = idf(docFreq=614, maxDocs=44218)
                0.0625 = fieldNorm(doc=4753)
          0.25811502 = weight(abstract_txt:citation in 4753) [ClassicSimilarity], result of:
            0.25811502 = score(doc=4753,freq=3.0), product of:
              0.48693123 = queryWeight, product of:
                6.2857614 = boost
                4.896717 = idf(docFreq=897, maxDocs=44218)
                0.015819937 = queryNorm
              0.53008515 = fieldWeight in 4753, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                4.896717 = idf(docFreq=897, maxDocs=44218)
                0.0625 = fieldNorm(doc=4753)
        0.4 = coord(10/25)
    
  4. Hooydonk, G. Van: Standardizing relative impacts : estimating the quality of research from citation counts (1998) 0.37
    0.37210894 = sum of:
      0.37210894 = product of:
        1.0336359 = sum of:
          0.018751198 = weight(abstract_txt:than in 1791) [ClassicSimilarity], result of:
            0.018751198 = score(doc=1791,freq=1.0), product of:
              0.061620027 = queryWeight, product of:
                3.8950868 = idf(docFreq=2444, maxDocs=44218)
                0.015819937 = queryNorm
              0.30430365 = fieldWeight in 1791, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.8950868 = idf(docFreq=2444, maxDocs=44218)
                0.078125 = fieldNorm(doc=1791)
          0.02547772 = weight(abstract_txt:specific in 1791) [ClassicSimilarity], result of:
            0.02547772 = score(doc=1791,freq=1.0), product of:
              0.07559207 = queryWeight, product of:
                1.1075853 = boost
                4.314141 = idf(docFreq=1607, maxDocs=44218)
                0.015819937 = queryNorm
              0.33704224 = fieldWeight in 1791, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.314141 = idf(docFreq=1607, maxDocs=44218)
                0.078125 = fieldNorm(doc=1791)
          0.024997575 = weight(abstract_txt:data in 1791) [ClassicSimilarity], result of:
            0.024997575 = score(doc=1791,freq=2.0), product of:
              0.06781434 = queryWeight, product of:
                1.2848294 = boost
                3.3363478 = idf(docFreq=4274, maxDocs=44218)
                0.015819937 = queryNorm
              0.36861783 = fieldWeight in 1791, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.3363478 = idf(docFreq=4274, maxDocs=44218)
                0.078125 = fieldNorm(doc=1791)
          0.08038388 = weight(abstract_txt:publications in 1791) [ClassicSimilarity], result of:
            0.08038388 = score(doc=1791,freq=3.0), product of:
              0.1127478 = queryWeight, product of:
                1.3526739 = boost
                5.268782 = idf(docFreq=618, maxDocs=44218)
                0.015819937 = queryNorm
              0.712953 = fieldWeight in 1791, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                5.268782 = idf(docFreq=618, maxDocs=44218)
                0.078125 = fieldNorm(doc=1791)
          0.16140667 = weight(abstract_txt:scores in 1791) [ClassicSimilarity], result of:
            0.16140667 = score(doc=1791,freq=3.0), product of:
              0.17944984 = queryWeight, product of:
                1.7065169 = boost
                6.6470313 = idf(docFreq=155, maxDocs=44218)
                0.015819937 = queryNorm
              0.8994528 = fieldWeight in 1791, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                6.6470313 = idf(docFreq=155, maxDocs=44218)
                0.078125 = fieldNorm(doc=1791)
          0.13437375 = weight(abstract_txt:number in 1791) [ClassicSimilarity], result of:
            0.13437375 = score(doc=1791,freq=4.0), product of:
              0.20809704 = queryWeight, product of:
                3.1829708 = boost
                4.132649 = idf(docFreq=1927, maxDocs=44218)
                0.015819937 = queryNorm
              0.6457264 = fieldWeight in 1791, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                4.132649 = idf(docFreq=1927, maxDocs=44218)
                0.078125 = fieldNorm(doc=1791)
          0.12999734 = weight(abstract_txt:impact in 1791) [ClassicSimilarity], result of:
            0.12999734 = score(doc=1791,freq=2.0), product of:
              0.25646174 = queryWeight, product of:
                3.5335479 = boost
                4.5878253 = idf(docFreq=1222, maxDocs=44218)
                0.015819937 = queryNorm
              0.50688785 = fieldWeight in 1791, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.5878253 = idf(docFreq=1222, maxDocs=44218)
                0.078125 = fieldNorm(doc=1791)
          0.13560392 = weight(abstract_txt:quality in 1791) [ClassicSimilarity], result of:
            0.13560392 = score(doc=1791,freq=2.0), product of:
              0.26378357 = queryWeight, product of:
                3.5836334 = boost
                4.6528544 = idf(docFreq=1145, maxDocs=44218)
                0.015819937 = queryNorm
              0.51407266 = fieldWeight in 1791, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.6528544 = idf(docFreq=1145, maxDocs=44218)
                0.078125 = fieldNorm(doc=1791)
          0.32264376 = weight(abstract_txt:citation in 1791) [ClassicSimilarity], result of:
            0.32264376 = score(doc=1791,freq=3.0), product of:
              0.48693123 = queryWeight, product of:
                6.2857614 = boost
                4.896717 = idf(docFreq=897, maxDocs=44218)
                0.015819937 = queryNorm
              0.6626064 = fieldWeight in 1791, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                4.896717 = idf(docFreq=897, maxDocs=44218)
                0.078125 = fieldNorm(doc=1791)
        0.36 = coord(9/25)
    
  5. Raan, A.F.J. van: ¬The influence of international collaboration on the impact of research results (1998) 0.36
    0.3611264 = sum of:
      0.3611264 = product of:
        1.12852 = sum of:
          0.018751198 = weight(abstract_txt:than in 5120) [ClassicSimilarity], result of:
            0.018751198 = score(doc=5120,freq=1.0), product of:
              0.061620027 = queryWeight, product of:
                3.8950868 = idf(docFreq=2444, maxDocs=44218)
                0.015819937 = queryNorm
              0.30430365 = fieldWeight in 5120, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.8950868 = idf(docFreq=2444, maxDocs=44218)
                0.078125 = fieldNorm(doc=5120)
          0.045074552 = weight(abstract_txt:authors in 5120) [ClassicSimilarity], result of:
            0.045074552 = score(doc=5120,freq=2.0), product of:
              0.08776341 = queryWeight, product of:
                1.1934268 = boost
                4.648501 = idf(docFreq=1150, maxDocs=44218)
                0.015819937 = queryNorm
              0.51359165 = fieldWeight in 5120, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.648501 = idf(docFreq=1150, maxDocs=44218)
                0.078125 = fieldNorm(doc=5120)
          0.015420352 = weight(abstract_txt:based in 5120) [ClassicSimilarity], result of:
            0.015420352 = score(doc=5120,freq=1.0), product of:
              0.06191499 = queryWeight, product of:
                1.2276727 = boost
                3.1879277 = idf(docFreq=4958, maxDocs=44218)
                0.015819937 = queryNorm
              0.24905685 = fieldWeight in 5120, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.1879277 = idf(docFreq=4958, maxDocs=44218)
                0.078125 = fieldNorm(doc=5120)
          0.017675957 = weight(abstract_txt:data in 5120) [ClassicSimilarity], result of:
            0.017675957 = score(doc=5120,freq=1.0), product of:
              0.06781434 = queryWeight, product of:
                1.2848294 = boost
                3.3363478 = idf(docFreq=4274, maxDocs=44218)
                0.015819937 = queryNorm
              0.26065218 = fieldWeight in 5120, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.3363478 = idf(docFreq=4274, maxDocs=44218)
                0.078125 = fieldNorm(doc=5120)
          0.11488638 = weight(abstract_txt:measured in 5120) [ClassicSimilarity], result of:
            0.11488638 = score(doc=5120,freq=2.0), product of:
              0.16375889 = queryWeight, product of:
                1.6302023 = boost
                6.3497796 = idf(docFreq=209, maxDocs=44218)
                0.015819937 = queryNorm
              0.7015581 = fieldWeight in 5120, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                6.3497796 = idf(docFreq=209, maxDocs=44218)
                0.078125 = fieldNorm(doc=5120)
          0.20554385 = weight(abstract_txt:impact in 5120) [ClassicSimilarity], result of:
            0.20554385 = score(doc=5120,freq=5.0), product of:
              0.25646174 = queryWeight, product of:
                3.5335479 = boost
                4.5878253 = idf(docFreq=1222, maxDocs=44218)
                0.015819937 = queryNorm
              0.8014601 = fieldWeight in 5120, product of:
                2.236068 = tf(freq=5.0), with freq of:
                  5.0 = termFreq=5.0
                4.5878253 = idf(docFreq=1222, maxDocs=44218)
                0.078125 = fieldNorm(doc=5120)
          0.38852403 = weight(abstract_txt:collaboration in 5120) [ClassicSimilarity], result of:
            0.38852403 = score(doc=5120,freq=6.0), product of:
              0.3471981 = queryWeight, product of:
                3.7531657 = boost
                5.8475623 = idf(docFreq=346, maxDocs=44218)
                0.015819937 = queryNorm
              1.1190269 = fieldWeight in 5120, product of:
                2.4494898 = tf(freq=6.0), with freq of:
                  6.0 = termFreq=6.0
                5.8475623 = idf(docFreq=346, maxDocs=44218)
                0.078125 = fieldNorm(doc=5120)
          0.32264376 = weight(abstract_txt:citation in 5120) [ClassicSimilarity], result of:
            0.32264376 = score(doc=5120,freq=3.0), product of:
              0.48693123 = queryWeight, product of:
                6.2857614 = boost
                4.896717 = idf(docFreq=897, maxDocs=44218)
                0.015819937 = queryNorm
              0.6626064 = fieldWeight in 5120, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                4.896717 = idf(docFreq=897, maxDocs=44218)
                0.078125 = fieldNorm(doc=5120)
        0.32 = coord(8/25)