Document (#37617)

Author
Waltman, L.
Schreiber, M.
Title
On the calculation of percentile-based bibliometric indicators
Source
Journal of the American Society for Information Science and Technology. 64(2013) no.2, S.372-379
Year
2013
Abstract
A percentile-based bibliometric indicator is an indicator that values publications based on their position within the citation distribution of their field. The most straightforward percentile-based indicator is the proportion of frequently cited publications, for instance, the proportion of publications that belong to the top 10% most frequently cited of their field. Recently, more complex percentile-based indicators have been proposed. A difficulty in the calculation of percentile-based indicators is caused by the discrete nature of citation distributions combined with the presence of many publications with the same number of citations. We introduce an approach to calculating percentile-based indicators that deals with this difficulty in a more satisfactory way than earlier approaches suggested in the literature. We show in a formal mathematical framework that our approach leads to indicators that do not suffer from biases in favor of or against particular fields of science.
Theme
Informetrie

Similar documents (author)

  1. Waltman, L.; Costas, R.: F1000 Recommendations as a potential new data source for research evaluation : a comparison with citations (2014) 1.75
    1.7514613 = sum of:
      1.7514613 = product of:
        3.5029225 = sum of:
          3.5029225 = weight(author_txt:waltman in 1212) [ClassicSimilarity], result of:
            3.5029225 = score(doc=1212,freq=1.0), product of:
              0.7793939 = queryWeight, product of:
                1.115337 = boost
                8.988837 = idf(docFreq=14, maxDocs=44218)
                0.077740505 = queryNorm
              4.4944186 = fieldWeight in 1212, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                8.988837 = idf(docFreq=14, maxDocs=44218)
                0.5 = fieldNorm(doc=1212)
        0.5 = coord(1/2)
    
  2. Schreiber, K.: Bestandsaufbau, Bestandspflege, Bestandserschließung eines Informationsapparates (1978) 1.58
    1.5779462 = sum of:
      1.5779462 = product of:
        3.1558924 = sum of:
          3.1558924 = weight(author_txt:schreiber in 5766) [ClassicSimilarity], result of:
            3.1558924 = score(doc=5766,freq=1.0), product of:
              0.62653416 = queryWeight, product of:
                8.059301 = idf(docFreq=37, maxDocs=44218)
                0.077740505 = queryNorm
              5.0370636 = fieldWeight in 5766, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                8.059301 = idf(docFreq=37, maxDocs=44218)
                0.625 = fieldNorm(doc=5766)
        0.5 = coord(1/2)
    
  3. Schreiber, K.: Hat die 'Literaturerschließung' in Universitäts- und Hochschulbibliotheken Zukunft? : zehn Jahre DFG-Programm 'Literaturerschließung'. Kritik und Vorschläge (1971) 1.58
    1.5779462 = sum of:
      1.5779462 = product of:
        3.1558924 = sum of:
          3.1558924 = weight(author_txt:schreiber in 7360) [ClassicSimilarity], result of:
            3.1558924 = score(doc=7360,freq=1.0), product of:
              0.62653416 = queryWeight, product of:
                8.059301 = idf(docFreq=37, maxDocs=44218)
                0.077740505 = queryNorm
              5.0370636 = fieldWeight in 7360, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                8.059301 = idf(docFreq=37, maxDocs=44218)
                0.625 = fieldNorm(doc=7360)
        0.5 = coord(1/2)
    
  4. Schreiber, K.: Fünf Jahre Informationsmittel für Bibliotheken (IfB) : Rückblick, gegenwärtiger Stand und Zukunftsperspektiven, Bericht über eine Veranstaltung auf dem 88. Deutschen Bibliothekartag 1998, frankfurt am Main (1998) 1.58
    1.5779462 = sum of:
      1.5779462 = product of:
        3.1558924 = sum of:
          3.1558924 = weight(author_txt:schreiber in 2) [ClassicSimilarity], result of:
            3.1558924 = score(doc=2,freq=1.0), product of:
              0.62653416 = queryWeight, product of:
                8.059301 = idf(docFreq=37, maxDocs=44218)
                0.077740505 = queryNorm
              5.0370636 = fieldWeight in 2, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                8.059301 = idf(docFreq=37, maxDocs=44218)
                0.625 = fieldNorm(doc=2)
        0.5 = coord(1/2)
    
  5. Schreiber, K.: Informationsmittel für Bibliotheken : ein neuer Informationsdienst von Bibliothekaren für Bibliothekare (1993) 1.58
    1.5779462 = sum of:
      1.5779462 = product of:
        3.1558924 = sum of:
          3.1558924 = weight(author_txt:schreiber in 1305) [ClassicSimilarity], result of:
            3.1558924 = score(doc=1305,freq=1.0), product of:
              0.62653416 = queryWeight, product of:
                8.059301 = idf(docFreq=37, maxDocs=44218)
                0.077740505 = queryNorm
              5.0370636 = fieldWeight in 1305, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                8.059301 = idf(docFreq=37, maxDocs=44218)
                0.625 = fieldNorm(doc=1305)
        0.5 = coord(1/2)
    

Similar documents (content)

  1. Leydesdorff, L.; Bornmann, L.; Mutz, R.; Opthof, T.: Turning the tables on citation analysis one more time : principles for comparing sets of documents (2011) 0.47
    0.47335252 = sum of:
      0.47335252 = product of:
        1.3148681 = sum of:
          0.010889349 = weight(abstract_txt:approach in 4485) [ClassicSimilarity], result of:
            0.010889349 = score(doc=4485,freq=1.0), product of:
              0.04651918 = queryWeight, product of:
                1.0037352 = boost
                3.745328 = idf(docFreq=2839, maxDocs=44218)
                0.0123743685 = queryNorm
              0.234083 = fieldWeight in 4485, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.745328 = idf(docFreq=2839, maxDocs=44218)
                0.0625 = fieldNorm(doc=4485)
          0.0048562917 = weight(abstract_txt:with in 4485) [ClassicSimilarity], result of:
            0.0048562917 = score(doc=4485,freq=1.0), product of:
              0.03108358 = queryWeight, product of:
                1.0048802 = boost
                2.4997334 = idf(docFreq=9868, maxDocs=44218)
                0.0123743685 = queryNorm
              0.15623334 = fieldWeight in 4485, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                2.4997334 = idf(docFreq=9868, maxDocs=44218)
                0.0625 = fieldNorm(doc=4485)
          0.048671797 = weight(abstract_txt:citation in 4485) [ClassicSimilarity], result of:
            0.048671797 = score(doc=4485,freq=4.0), product of:
              0.07951743 = queryWeight, product of:
                1.3123035 = boost
                4.896717 = idf(docFreq=897, maxDocs=44218)
                0.0123743685 = queryNorm
              0.61208963 = fieldWeight in 4485, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                4.896717 = idf(docFreq=897, maxDocs=44218)
                0.0625 = fieldNorm(doc=4485)
          0.009748635 = weight(abstract_txt:that in 4485) [ClassicSimilarity], result of:
            0.009748635 = score(doc=4485,freq=2.0), product of:
              0.046547532 = queryWeight, product of:
                1.5875282 = boost
                2.3694751 = idf(docFreq=11241, maxDocs=44218)
                0.0123743685 = queryNorm
              0.20943399 = fieldWeight in 4485, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                2.3694751 = idf(docFreq=11241, maxDocs=44218)
                0.0625 = fieldNorm(doc=4485)
          0.048718143 = weight(abstract_txt:bibliometric in 4485) [ClassicSimilarity], result of:
            0.048718143 = score(doc=4485,freq=1.0), product of:
              0.12630618 = queryWeight, product of:
                1.6539235 = boost
                6.1714344 = idf(docFreq=250, maxDocs=44218)
                0.0123743685 = queryNorm
              0.38571465 = fieldWeight in 4485, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.1714344 = idf(docFreq=250, maxDocs=44218)
                0.0625 = fieldNorm(doc=4485)
          0.098039806 = weight(abstract_txt:indicator in 4485) [ClassicSimilarity], result of:
            0.098039806 = score(doc=4485,freq=1.0), product of:
              0.23046032 = queryWeight, product of:
                2.7361937 = boost
                6.806538 = idf(docFreq=132, maxDocs=44218)
                0.0123743685 = queryNorm
              0.42540863 = fieldWeight in 4485, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.806538 = idf(docFreq=132, maxDocs=44218)
                0.0625 = fieldNorm(doc=4485)
          0.033238452 = weight(abstract_txt:based in 4485) [ClassicSimilarity], result of:
            0.033238452 = score(doc=4485,freq=2.0), product of:
              0.1179607 = queryWeight, product of:
                2.9902384 = boost
                3.1879277 = idf(docFreq=4958, maxDocs=44218)
                0.0123743685 = queryNorm
              0.28177565 = fieldWeight in 4485, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.1879277 = idf(docFreq=4958, maxDocs=44218)
                0.0625 = fieldNorm(doc=4485)
          0.22688578 = weight(abstract_txt:indicators in 4485) [ClassicSimilarity], result of:
            0.22688578 = score(doc=4485,freq=4.0), product of:
              0.30115885 = queryWeight, product of:
                4.038043 = boost
                6.027006 = idf(docFreq=289, maxDocs=44218)
                0.0123743685 = queryNorm
              0.75337577 = fieldWeight in 4485, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                6.027006 = idf(docFreq=289, maxDocs=44218)
                0.0625 = fieldNorm(doc=4485)
          0.83381987 = weight(abstract_txt:percentile in 4485) [ClassicSimilarity], result of:
            0.83381987 = score(doc=4485,freq=4.0), product of:
              0.76213634 = queryWeight, product of:
                7.036879 = boost
                8.752448 = idf(docFreq=18, maxDocs=44218)
                0.0123743685 = queryNorm
              1.094056 = fieldWeight in 4485, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                8.752448 = idf(docFreq=18, maxDocs=44218)
                0.0625 = fieldNorm(doc=4485)
        0.36 = coord(9/25)
    
  2. 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) 0.37
    0.36773872 = sum of:
      0.36773872 = product of:
        1.1491835 = sum of:
          0.01051418 = weight(abstract_txt:with in 656) [ClassicSimilarity], result of:
            0.01051418 = score(doc=656,freq=3.0), product of:
              0.03108358 = queryWeight, product of:
                1.0048802 = boost
                2.4997334 = idf(docFreq=9868, maxDocs=44218)
                0.0123743685 = queryNorm
              0.3382551 = fieldWeight in 656, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                2.4997334 = idf(docFreq=9868, maxDocs=44218)
                0.078125 = fieldNorm(doc=656)
          0.02247329 = weight(abstract_txt:most in 656) [ClassicSimilarity], result of:
            0.02247329 = score(doc=656,freq=2.0), product of:
              0.051577292 = queryWeight, product of:
                1.0568963 = boost
                3.943693 = idf(docFreq=2328, maxDocs=44218)
                0.0123743685 = queryNorm
              0.43572062 = fieldWeight in 656, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.943693 = idf(docFreq=2328, maxDocs=44218)
                0.078125 = fieldNorm(doc=656)
          0.043020196 = weight(abstract_txt:citation in 656) [ClassicSimilarity], result of:
            0.043020196 = score(doc=656,freq=2.0), product of:
              0.07951743 = queryWeight, product of:
                1.3123035 = boost
                4.896717 = idf(docFreq=897, maxDocs=44218)
                0.0123743685 = queryNorm
              0.5410159 = fieldWeight in 656, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.896717 = idf(docFreq=897, maxDocs=44218)
                0.078125 = fieldNorm(doc=656)
          0.012185794 = weight(abstract_txt:that in 656) [ClassicSimilarity], result of:
            0.012185794 = score(doc=656,freq=2.0), product of:
              0.046547532 = queryWeight, product of:
                1.5875282 = boost
                2.3694751 = idf(docFreq=11241, maxDocs=44218)
                0.0123743685 = queryNorm
              0.26179248 = fieldWeight in 656, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                2.3694751 = idf(docFreq=11241, maxDocs=44218)
                0.078125 = fieldNorm(doc=656)
          0.060897678 = weight(abstract_txt:bibliometric in 656) [ClassicSimilarity], result of:
            0.060897678 = score(doc=656,freq=1.0), product of:
              0.12630618 = queryWeight, product of:
                1.6539235 = boost
                6.1714344 = idf(docFreq=250, maxDocs=44218)
                0.0123743685 = queryNorm
              0.4821433 = fieldWeight in 656, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.1714344 = idf(docFreq=250, maxDocs=44218)
                0.078125 = fieldNorm(doc=656)
          0.1318233 = weight(abstract_txt:calculation in 656) [ClassicSimilarity], result of:
            0.1318233 = score(doc=656,freq=1.0), product of:
              0.21135809 = queryWeight, product of:
                2.1395013 = boost
                7.983315 = idf(docFreq=40, maxDocs=44218)
                0.0123743685 = queryNorm
              0.6236965 = fieldWeight in 656, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                7.983315 = idf(docFreq=40, maxDocs=44218)
                0.078125 = fieldNorm(doc=656)
          0.13126947 = weight(abstract_txt:publications in 656) [ClassicSimilarity], result of:
            0.13126947 = score(doc=656,freq=3.0), product of:
              0.1841208 = queryWeight, product of:
                2.8240316 = boost
                5.268782 = idf(docFreq=618, maxDocs=44218)
                0.0123743685 = queryNorm
              0.712953 = fieldWeight in 656, 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=656)
          0.7369996 = weight(abstract_txt:percentile in 656) [ClassicSimilarity], result of:
            0.7369996 = score(doc=656,freq=2.0), product of:
              0.76213634 = queryWeight, product of:
                7.036879 = boost
                8.752448 = idf(docFreq=18, maxDocs=44218)
                0.0123743685 = queryNorm
              0.967018 = fieldWeight in 656, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                8.752448 = idf(docFreq=18, maxDocs=44218)
                0.078125 = fieldNorm(doc=656)
        0.32 = coord(8/25)
    
  3. Thelwall, M.; Kousha, K.; Stuart, E.; Makita, M.; Abdoli, M.; Wilson, P.; Levitt, J.: In which fields are citations indicators of research quality? (2023) 0.29
    0.293142 = sum of:
      0.293142 = product of:
        0.81428325 = sum of:
          0.0048562917 = weight(abstract_txt:with in 1033) [ClassicSimilarity], result of:
            0.0048562917 = score(doc=1033,freq=1.0), product of:
              0.03108358 = queryWeight, product of:
                1.0048802 = boost
                2.4997334 = idf(docFreq=9868, maxDocs=44218)
                0.0123743685 = queryNorm
              0.15623334 = fieldWeight in 1033, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                2.4997334 = idf(docFreq=9868, maxDocs=44218)
                0.0625 = fieldNorm(doc=1033)
          0.042008303 = weight(abstract_txt:field in 1033) [ClassicSimilarity], result of:
            0.042008303 = score(doc=1033,freq=5.0), product of:
              0.06691614 = queryWeight, product of:
                1.2038394 = boost
                4.491995 = idf(docFreq=1345, maxDocs=44218)
                0.0123743685 = queryNorm
              0.6277754 = fieldWeight in 1033, product of:
                2.236068 = tf(freq=5.0), with freq of:
                  5.0 = termFreq=5.0
                4.491995 = idf(docFreq=1345, maxDocs=44218)
                0.0625 = fieldNorm(doc=1033)
          0.048671797 = weight(abstract_txt:citation in 1033) [ClassicSimilarity], result of:
            0.048671797 = score(doc=1033,freq=4.0), product of:
              0.07951743 = queryWeight, product of:
                1.3123035 = boost
                4.896717 = idf(docFreq=897, maxDocs=44218)
                0.0123743685 = queryNorm
              0.61208963 = fieldWeight in 1033, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                4.896717 = idf(docFreq=897, maxDocs=44218)
                0.0625 = fieldNorm(doc=1033)
          0.057102475 = weight(abstract_txt:cited in 1033) [ClassicSimilarity], result of:
            0.057102475 = score(doc=1033,freq=2.0), product of:
              0.11144418 = queryWeight, product of:
                1.5535736 = boost
                5.79699 = idf(docFreq=364, maxDocs=44218)
                0.0123743685 = queryNorm
              0.5123863 = fieldWeight in 1033, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                5.79699 = idf(docFreq=364, maxDocs=44218)
                0.0625 = fieldNorm(doc=1033)
          0.009748635 = weight(abstract_txt:that in 1033) [ClassicSimilarity], result of:
            0.009748635 = score(doc=1033,freq=2.0), product of:
              0.046547532 = queryWeight, product of:
                1.5875282 = boost
                2.3694751 = idf(docFreq=11241, maxDocs=44218)
                0.0123743685 = queryNorm
              0.20943399 = fieldWeight in 1033, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                2.3694751 = idf(docFreq=11241, maxDocs=44218)
                0.0625 = fieldNorm(doc=1033)
          0.098039806 = weight(abstract_txt:indicator in 1033) [ClassicSimilarity], result of:
            0.098039806 = score(doc=1033,freq=1.0), product of:
              0.23046032 = queryWeight, product of:
                2.7361937 = boost
                6.806538 = idf(docFreq=132, maxDocs=44218)
                0.0123743685 = queryNorm
              0.42540863 = fieldWeight in 1033, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.806538 = idf(docFreq=132, maxDocs=44218)
                0.0625 = fieldNorm(doc=1033)
          0.023503136 = weight(abstract_txt:based in 1033) [ClassicSimilarity], result of:
            0.023503136 = score(doc=1033,freq=1.0), product of:
              0.1179607 = queryWeight, product of:
                2.9902384 = boost
                3.1879277 = idf(docFreq=4958, maxDocs=44218)
                0.0123743685 = queryNorm
              0.19924548 = fieldWeight in 1033, 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=1033)
          0.11344289 = weight(abstract_txt:indicators in 1033) [ClassicSimilarity], result of:
            0.11344289 = score(doc=1033,freq=1.0), product of:
              0.30115885 = queryWeight, product of:
                4.038043 = boost
                6.027006 = idf(docFreq=289, maxDocs=44218)
                0.0123743685 = queryNorm
              0.37668788 = fieldWeight in 1033, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.027006 = idf(docFreq=289, maxDocs=44218)
                0.0625 = fieldNorm(doc=1033)
          0.41690993 = weight(abstract_txt:percentile in 1033) [ClassicSimilarity], result of:
            0.41690993 = score(doc=1033,freq=1.0), product of:
              0.76213634 = queryWeight, product of:
                7.036879 = boost
                8.752448 = idf(docFreq=18, maxDocs=44218)
                0.0123743685 = queryNorm
              0.547028 = fieldWeight in 1033, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                8.752448 = idf(docFreq=18, maxDocs=44218)
                0.0625 = fieldNorm(doc=1033)
        0.36 = coord(9/25)
    
  4. Mutz, R.; Daniel, H.-D.: What is behind the curtain of the Leiden Ranking? (2015) 0.27
    0.2696653 = sum of:
      0.2696653 = product of:
        0.7490703 = sum of:
          0.0068678334 = weight(abstract_txt:with in 2171) [ClassicSimilarity], result of:
            0.0068678334 = score(doc=2171,freq=2.0), product of:
              0.03108358 = queryWeight, product of:
                1.0048802 = boost
                2.4997334 = idf(docFreq=9868, maxDocs=44218)
                0.0123743685 = queryNorm
              0.22094731 = fieldWeight in 2171, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                2.4997334 = idf(docFreq=9868, maxDocs=44218)
                0.0625 = fieldNorm(doc=2171)
          0.018786684 = weight(abstract_txt:field in 2171) [ClassicSimilarity], result of:
            0.018786684 = score(doc=2171,freq=1.0), product of:
              0.06691614 = queryWeight, product of:
                1.2038394 = boost
                4.491995 = idf(docFreq=1345, maxDocs=44218)
                0.0123743685 = queryNorm
              0.28074968 = fieldWeight in 2171, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.491995 = idf(docFreq=1345, maxDocs=44218)
                0.0625 = fieldNorm(doc=2171)
          0.024335898 = weight(abstract_txt:citation in 2171) [ClassicSimilarity], result of:
            0.024335898 = score(doc=2171,freq=1.0), product of:
              0.07951743 = queryWeight, product of:
                1.3123035 = boost
                4.896717 = idf(docFreq=897, maxDocs=44218)
                0.0123743685 = queryNorm
              0.30604482 = fieldWeight in 2171, 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=2171)
          0.006893326 = weight(abstract_txt:that in 2171) [ClassicSimilarity], result of:
            0.006893326 = score(doc=2171,freq=1.0), product of:
              0.046547532 = queryWeight, product of:
                1.5875282 = boost
                2.3694751 = idf(docFreq=11241, maxDocs=44218)
                0.0123743685 = queryNorm
              0.1480922 = fieldWeight in 2171, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                2.3694751 = idf(docFreq=11241, maxDocs=44218)
                0.0625 = fieldNorm(doc=2171)
          0.048718143 = weight(abstract_txt:bibliometric in 2171) [ClassicSimilarity], result of:
            0.048718143 = score(doc=2171,freq=1.0), product of:
              0.12630618 = queryWeight, product of:
                1.6539235 = boost
                6.1714344 = idf(docFreq=250, maxDocs=44218)
                0.0123743685 = queryNorm
              0.38571465 = fieldWeight in 2171, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.1714344 = idf(docFreq=250, maxDocs=44218)
                0.0625 = fieldNorm(doc=2171)
          0.098039806 = weight(abstract_txt:indicator in 2171) [ClassicSimilarity], result of:
            0.098039806 = score(doc=2171,freq=1.0), product of:
              0.23046032 = queryWeight, product of:
                2.7361937 = boost
                6.806538 = idf(docFreq=132, maxDocs=44218)
                0.0123743685 = queryNorm
              0.42540863 = fieldWeight in 2171, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.806538 = idf(docFreq=132, maxDocs=44218)
                0.0625 = fieldNorm(doc=2171)
          0.10501558 = weight(abstract_txt:publications in 2171) [ClassicSimilarity], result of:
            0.10501558 = score(doc=2171,freq=3.0), product of:
              0.1841208 = queryWeight, product of:
                2.8240316 = boost
                5.268782 = idf(docFreq=618, maxDocs=44218)
                0.0123743685 = queryNorm
              0.5703624 = fieldWeight in 2171, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                5.268782 = idf(docFreq=618, maxDocs=44218)
                0.0625 = fieldNorm(doc=2171)
          0.023503136 = weight(abstract_txt:based in 2171) [ClassicSimilarity], result of:
            0.023503136 = score(doc=2171,freq=1.0), product of:
              0.1179607 = queryWeight, product of:
                2.9902384 = boost
                3.1879277 = idf(docFreq=4958, maxDocs=44218)
                0.0123743685 = queryNorm
              0.19924548 = fieldWeight in 2171, 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=2171)
          0.41690993 = weight(abstract_txt:percentile in 2171) [ClassicSimilarity], result of:
            0.41690993 = score(doc=2171,freq=1.0), product of:
              0.76213634 = queryWeight, product of:
                7.036879 = boost
                8.752448 = idf(docFreq=18, maxDocs=44218)
                0.0123743685 = queryNorm
              0.547028 = fieldWeight in 2171, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                8.752448 = idf(docFreq=18, maxDocs=44218)
                0.0625 = fieldNorm(doc=2171)
        0.36 = coord(9/25)
    
  5. Schreiber, M.: Empirical evidence for the relevance of fractional scoring in the calculation of percentile rank scores (2013) 0.26
    0.25599423 = sum of:
      0.25599423 = product of:
        1.2799711 = sum of:
          0.012617015 = weight(abstract_txt:with in 640) [ClassicSimilarity], result of:
            0.012617015 = score(doc=640,freq=3.0), product of:
              0.03108358 = queryWeight, product of:
                1.0048802 = boost
                2.4997334 = idf(docFreq=9868, maxDocs=44218)
                0.0123743685 = queryNorm
              0.4059061 = fieldWeight in 640, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                2.4997334 = idf(docFreq=9868, maxDocs=44218)
                0.09375 = fieldNorm(doc=640)
          0.019069219 = weight(abstract_txt:most in 640) [ClassicSimilarity], result of:
            0.019069219 = score(doc=640,freq=1.0), product of:
              0.051577292 = queryWeight, product of:
                1.0568963 = boost
                3.943693 = idf(docFreq=2328, maxDocs=44218)
                0.0123743685 = queryNorm
              0.3697212 = fieldWeight in 640, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.943693 = idf(docFreq=2328, maxDocs=44218)
                0.09375 = fieldNorm(doc=640)
          0.036503848 = weight(abstract_txt:citation in 640) [ClassicSimilarity], result of:
            0.036503848 = score(doc=640,freq=1.0), product of:
              0.07951743 = queryWeight, product of:
                1.3123035 = boost
                4.896717 = idf(docFreq=897, maxDocs=44218)
                0.0123743685 = queryNorm
              0.45906723 = fieldWeight in 640, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.896717 = idf(docFreq=897, maxDocs=44218)
                0.09375 = fieldNorm(doc=640)
          0.12861729 = weight(abstract_txt:publications in 640) [ClassicSimilarity], result of:
            0.12861729 = score(doc=640,freq=2.0), product of:
              0.1841208 = queryWeight, product of:
                2.8240316 = boost
                5.268782 = idf(docFreq=618, maxDocs=44218)
                0.0123743685 = queryNorm
              0.6985484 = fieldWeight in 640, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                5.268782 = idf(docFreq=618, maxDocs=44218)
                0.09375 = fieldNorm(doc=640)
          1.0831637 = weight(abstract_txt:percentile in 640) [ClassicSimilarity], result of:
            1.0831637 = score(doc=640,freq=3.0), product of:
              0.76213634 = queryWeight, product of:
                7.036879 = boost
                8.752448 = idf(docFreq=18, maxDocs=44218)
                0.0123743685 = queryNorm
              1.4212204 = fieldWeight in 640, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                8.752448 = idf(docFreq=18, maxDocs=44218)
                0.09375 = fieldNorm(doc=640)
        0.2 = coord(5/25)