Document (#33954)

Author

Bensman, S.J.

Title

Distributional differences of the impact factor in the sciences versus the social sciences : an analysis of the probabilistic structure of the 2005 journal citation reports

Source

Journal of the American Society for Information Science and Technology. 59(2008) no.9, S.1366-1382

Year

2008

Abstract

This paper examines the probability structure of the 2005 Science Citation Index (SCI) and Social Sciences Citation Index (SSCI) Journal Citation Reports (JCR) by analyzing the Impact Factor distributions of their journals. The distribution of the SCI journals corresponded with a distribution generally modeled by the negative binomial distribution, whereas the SSCI distribution fit the Poisson distribution modeling random, rare events. Both Impact Factor distributions were positively skewed - the SCI much more so than the SSCI - indicating excess variance. One of the causes of this excess variance was that the journals highest in the Impact Factor in both JCRs tended to class in subject categories well funded by the National Institutes of Health. The main reason for the SCI Impact Factor distribution being more skewed than the SSCI one was that review journals defining disciplinary paradigms play a much more important role in the sciences than in the social sciences.

Theme

Informetrie
Citation indexing

Object

Science Citation Index
Social Sciences Citation Index
Journal Citation Reports

Similar documents (author)

1. Bensman, S.J.: Garfield and the impact factors (2007) 5.76

   5.7603507 = sum of:
     5.7603507 = weight(author_txt:bensman in 4679) [ClassicSimilarity], result of:
       5.7603507 = fieldWeight in 4679, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         9.216561 = idf(docFreq=11, maxDocs=44421)
         0.625 = fieldNorm(doc=4679)
   

2. Bensman, S.J.: Probability distributions in library and information science : a historical and practitioner viewpoint (2000) 5.76

   5.7603507 = sum of:
     5.7603507 = weight(author_txt:bensman in 5859) [ClassicSimilarity], result of:
       5.7603507 = fieldWeight in 5859, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         9.216561 = idf(docFreq=11, maxDocs=44421)
         0.625 = fieldNorm(doc=5859)
   

3. Bensman, S.J.: Urquhart's and Garfield's laws : the British controversy over their validity (2001) 5.76

   5.7603507 = sum of:
     5.7603507 = weight(author_txt:bensman in 26) [ClassicSimilarity], result of:
       5.7603507 = fieldWeight in 26, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         9.216561 = idf(docFreq=11, maxDocs=44421)
         0.625 = fieldNorm(doc=26)
   

4. Bensman, S.J.: Urquhart and probability : the transition from librarianship to library and information science (2005) 5.76

   5.7603507 = sum of:
     5.7603507 = weight(author_txt:bensman in 4311) [ClassicSimilarity], result of:
       5.7603507 = fieldWeight in 4311, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         9.216561 = idf(docFreq=11, maxDocs=44421)
         0.625 = fieldNorm(doc=4311)
   

5. Bensman, S.J.: ¬The impact factor, total citations, and better citation mouse traps : a commentary (2007) 5.76

   5.7603507 = sum of:
     5.7603507 = weight(author_txt:bensman in 1603) [ClassicSimilarity], result of:
       5.7603507 = fieldWeight in 1603, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         9.216561 = idf(docFreq=11, maxDocs=44421)
         0.625 = fieldNorm(doc=1603)
   

Similar documents (content)

1. Bensman, S.J.; Smolinsky, L.J.; Pudovkin, A.I.: Mean citation rate per article in mathematics journals : differences from the scientific model (2010) 0.85

   0.8548697 = sum of:
     0.8548697 = product of:
       1.335734 = sum of:
         0.11366947 = weight(abstract_txt:binomial in 582) [ClassicSimilarity], result of:
           0.11366947 = score(doc=582,freq=3.0), product of:
             0.13862146 = queryWeight, product of:
               1.1372665 = boost
               8.656945 = idf(docFreq=20, maxDocs=44421)
               0.01408003 = queryNorm
             0.81999904 = fieldWeight in 582, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               8.656945 = idf(docFreq=20, maxDocs=44421)
               0.0546875 = fieldNorm(doc=582)
         0.016745314 = weight(abstract_txt:structure in 582) [ClassicSimilarity], result of:
           0.016745314 = score(doc=582,freq=1.0), product of:
             0.07026093 = queryWeight, product of:
               1.1450355 = boost
               4.3580413 = idf(docFreq=1545, maxDocs=44421)
               0.01408003 = queryNorm
             0.23833038 = fieldWeight in 582, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.3580413 = idf(docFreq=1545, maxDocs=44421)
               0.0546875 = fieldNorm(doc=582)
         0.069195695 = weight(abstract_txt:poisson in 582) [ClassicSimilarity], result of:
           0.069195695 = score(doc=582,freq=1.0), product of:
             0.14360219 = queryWeight, product of:
               1.1575174 = boost
               8.811096 = idf(docFreq=17, maxDocs=44421)
               0.01408003 = queryNorm
             0.48185682 = fieldWeight in 582, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.811096 = idf(docFreq=17, maxDocs=44421)
               0.0546875 = fieldNorm(doc=582)
         0.01954258 = weight(abstract_txt:reports in 582) [ClassicSimilarity], result of:
           0.01954258 = score(doc=582,freq=1.0), product of:
             0.077882454 = queryWeight, product of:
               1.2055405 = boost
               4.5883255 = idf(docFreq=1227, maxDocs=44421)
               0.01408003 = queryNorm
             0.25092405 = fieldWeight in 582, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.5883255 = idf(docFreq=1227, maxDocs=44421)
               0.0546875 = fieldNorm(doc=582)
         0.021677867 = weight(abstract_txt:index in 582) [ClassicSimilarity], result of:
           0.021677867 = score(doc=582,freq=1.0), product of:
             0.083456986 = queryWeight, product of:
               1.247939 = boost
               4.7496953 = idf(docFreq=1044, maxDocs=44421)
               0.01408003 = queryNorm
             0.25974897 = fieldWeight in 582, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.7496953 = idf(docFreq=1044, maxDocs=44421)
               0.0546875 = fieldNorm(doc=582)
         0.035108197 = weight(abstract_txt:much in 582) [ClassicSimilarity], result of:
           0.035108197 = score(doc=582,freq=2.0), product of:
             0.09135116 = queryWeight, product of:
               1.3056267 = boost
               4.969257 = idf(docFreq=838, maxDocs=44421)
               0.01408003 = queryNorm
             0.38432133 = fieldWeight in 582, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.969257 = idf(docFreq=838, maxDocs=44421)
               0.0546875 = fieldNorm(doc=582)
         0.027525628 = weight(abstract_txt:journal in 582) [ClassicSimilarity], result of:
           0.027525628 = score(doc=582,freq=1.0), product of:
             0.09786104 = queryWeight, product of:
               1.3513471 = boost
               5.14327 = idf(docFreq=704, maxDocs=44421)
               0.01408003 = queryNorm
             0.2812726 = fieldWeight in 582, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.14327 = idf(docFreq=704, maxDocs=44421)
               0.0546875 = fieldNorm(doc=582)
         0.017900953 = weight(abstract_txt:than in 582) [ClassicSimilarity], result of:
           0.017900953 = score(doc=582,freq=1.0), product of:
             0.084087774 = queryWeight, product of:
               1.534172 = boost
               3.8927383 = idf(docFreq=2461, maxDocs=44421)
               0.01408003 = queryNorm
             0.21288413 = fieldWeight in 582, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.8927383 = idf(docFreq=2461, maxDocs=44421)
               0.0546875 = fieldNorm(doc=582)
         0.09100907 = weight(abstract_txt:distributions in 582) [ClassicSimilarity], result of:
           0.09100907 = score(doc=582,freq=2.0), product of:
             0.17238447 = queryWeight, product of:
               1.79354 = boost
               6.82627 = idf(docFreq=130, maxDocs=44421)
               0.01408003 = queryNorm
             0.5279424 = fieldWeight in 582, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               6.82627 = idf(docFreq=130, maxDocs=44421)
               0.0546875 = fieldNorm(doc=582)
         0.13736112 = weight(abstract_txt:variance in 582) [ClassicSimilarity], result of:
           0.13736112 = score(doc=582,freq=2.0), product of:
             0.22682153 = queryWeight, product of:
               2.0573308 = boost
               7.8302665 = idf(docFreq=47, maxDocs=44421)
               0.01408003 = queryNorm
             0.60559124 = fieldWeight in 582, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               7.8302665 = idf(docFreq=47, maxDocs=44421)
               0.0546875 = fieldNorm(doc=582)
         0.118598945 = weight(abstract_txt:skewed in 582) [ClassicSimilarity], result of:
           0.118598945 = score(doc=582,freq=1.0), product of:
             0.25912276 = queryWeight, product of:
               2.1989472 = boost
               8.369263 = idf(docFreq=27, maxDocs=44421)
               0.01408003 = queryNorm
             0.45769405 = fieldWeight in 582, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.369263 = idf(docFreq=27, maxDocs=44421)
               0.0546875 = fieldNorm(doc=582)
         0.09463793 = weight(abstract_txt:citation in 582) [ClassicSimilarity], result of:
           0.09463793 = score(doc=582,freq=4.0), product of:
             0.17693694 = queryWeight, product of:
               2.5697227 = boost
               4.890223 = idf(docFreq=907, maxDocs=44421)
               0.01408003 = queryNorm
             0.5348681 = fieldWeight in 582, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               4.890223 = idf(docFreq=907, maxDocs=44421)
               0.0546875 = fieldNorm(doc=582)
         0.094493076 = weight(abstract_txt:journals in 582) [ClassicSimilarity], result of:
           0.094493076 = score(doc=582,freq=3.0), product of:
             0.19454552 = queryWeight, product of:
               2.6945586 = boost
               5.1277876 = idf(docFreq=715, maxDocs=44421)
               0.01408003 = queryNorm
             0.4857119 = fieldWeight in 582, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               5.1277876 = idf(docFreq=715, maxDocs=44421)
               0.0546875 = fieldNorm(doc=582)
         0.09673527 = weight(abstract_txt:impact in 582) [ClassicSimilarity], result of:
           0.09673527 = score(doc=582,freq=4.0), product of:
             0.19340524 = queryWeight, product of:
               3.0037663 = boost
               4.572972 = idf(docFreq=1246, maxDocs=44421)
               0.01408003 = queryNorm
             0.5001688 = fieldWeight in 582, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               4.572972 = idf(docFreq=1246, maxDocs=44421)
               0.0546875 = fieldNorm(doc=582)
         0.1972474 = weight(abstract_txt:factor in 582) [ClassicSimilarity], result of:
           0.1972474 = score(doc=582,freq=4.0), product of:
             0.3109944 = queryWeight, product of:
               3.8089767 = boost
               5.7988343 = idf(docFreq=365, maxDocs=44421)
               0.01408003 = queryNorm
             0.6342475 = fieldWeight in 582, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               5.7988343 = idf(docFreq=365, maxDocs=44421)
               0.0546875 = fieldNorm(doc=582)
         0.18428555 = weight(abstract_txt:distribution in 582) [ClassicSimilarity], result of:
           0.18428555 = score(doc=582,freq=3.0), product of:
             0.34762624 = queryWeight, product of:
               4.411425 = boost
               5.5966744 = idf(docFreq=447, maxDocs=44421)
               0.01408003 = queryNorm
             0.53012556 = fieldWeight in 582, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               5.5966744 = idf(docFreq=447, maxDocs=44421)
               0.0546875 = fieldNorm(doc=582)
       0.64 = coord(16/25)
   

2. Leydesdorff, L.; Moya-Anegón, F. de; Nooy, W. de: Aggregated journal-journal citation relations in scopus and web of science matched and compared in terms of networks, maps, and interactive overlays (2016) 0.39

   0.39134902 = sum of:
     0.39134902 = product of:
       0.88942957 = sum of:
         0.012747599 = weight(abstract_txt:both in 4090) [ClassicSimilarity], result of:
           0.012747599 = score(doc=4090,freq=1.0), product of:
             0.05358904 = queryWeight, product of:
               3.8060317 = idf(docFreq=2684, maxDocs=44421)
               0.01408003 = queryNorm
             0.23787698 = fieldWeight in 4090, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.8060317 = idf(docFreq=2684, maxDocs=44421)
               0.0625 = fieldNorm(doc=4090)
         0.022334378 = weight(abstract_txt:reports in 4090) [ClassicSimilarity], result of:
           0.022334378 = score(doc=4090,freq=1.0), product of:
             0.077882454 = queryWeight, product of:
               1.2055405 = boost
               4.5883255 = idf(docFreq=1227, maxDocs=44421)
               0.01408003 = queryNorm
             0.28677034 = fieldWeight in 4090, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.5883255 = idf(docFreq=1227, maxDocs=44421)
               0.0625 = fieldNorm(doc=4090)
         0.03503672 = weight(abstract_txt:index in 4090) [ClassicSimilarity], result of:
           0.03503672 = score(doc=4090,freq=2.0), product of:
             0.083456986 = queryWeight, product of:
               1.247939 = boost
               4.7496953 = idf(docFreq=1044, maxDocs=44421)
               0.01408003 = queryNorm
             0.41981772 = fieldWeight in 4090, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.7496953 = idf(docFreq=1044, maxDocs=44421)
               0.0625 = fieldNorm(doc=4090)
         0.01921361 = weight(abstract_txt:more in 4090) [ClassicSimilarity], result of:
           0.01921361 = score(doc=4090,freq=2.0), product of:
             0.06400543 = queryWeight, product of:
               1.3384928 = boost
               3.3962307 = idf(docFreq=4044, maxDocs=44421)
               0.01408003 = queryNorm
             0.3001872 = fieldWeight in 4090, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.3962307 = idf(docFreq=4044, maxDocs=44421)
               0.0625 = fieldNorm(doc=4090)
         0.06291572 = weight(abstract_txt:journal in 4090) [ClassicSimilarity], result of:
           0.06291572 = score(doc=4090,freq=4.0), product of:
             0.09786104 = queryWeight, product of:
               1.3513471 = boost
               5.14327 = idf(docFreq=704, maxDocs=44421)
               0.01408003 = queryNorm
             0.64290875 = fieldWeight in 4090, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               5.14327 = idf(docFreq=704, maxDocs=44421)
               0.0625 = fieldNorm(doc=4090)
         0.04091646 = weight(abstract_txt:than in 4090) [ClassicSimilarity], result of:
           0.04091646 = score(doc=4090,freq=4.0), product of:
             0.084087774 = queryWeight, product of:
               1.534172 = boost
               3.8927383 = idf(docFreq=2461, maxDocs=44421)
               0.01408003 = queryNorm
             0.4865923 = fieldWeight in 4090, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               3.8927383 = idf(docFreq=2461, maxDocs=44421)
               0.0625 = fieldNorm(doc=4090)
         0.02575299 = weight(abstract_txt:social in 4090) [ClassicSimilarity], result of:
           0.02575299 = score(doc=4090,freq=1.0), product of:
             0.09803306 = queryWeight, product of:
               1.6565095 = boost
               4.2031517 = idf(docFreq=1804, maxDocs=44421)
               0.01408003 = queryNorm
             0.26269698 = fieldWeight in 4090, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.2031517 = idf(docFreq=1804, maxDocs=44421)
               0.0625 = fieldNorm(doc=4090)
         0.108157635 = weight(abstract_txt:citation in 4090) [ClassicSimilarity], result of:
           0.108157635 = score(doc=4090,freq=4.0), product of:
             0.17693694 = queryWeight, product of:
               2.5697227 = boost
               4.890223 = idf(docFreq=907, maxDocs=44421)
               0.01408003 = queryNorm
             0.6112779 = fieldWeight in 4090, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               4.890223 = idf(docFreq=907, maxDocs=44421)
               0.0625 = fieldNorm(doc=4090)
         0.19716567 = weight(abstract_txt:journals in 4090) [ClassicSimilarity], result of:
           0.19716567 = score(doc=4090,freq=10.0), product of:
             0.19454552 = queryWeight, product of:
               2.6945586 = boost
               5.1277876 = idf(docFreq=715, maxDocs=44421)
               0.01408003 = queryNorm
             1.013468 = fieldWeight in 4090, product of:
               3.1622777 = tf(freq=10.0), with freq of:
                 10.0 = termFreq=10.0
               5.1277876 = idf(docFreq=715, maxDocs=44421)
               0.0625 = fieldNorm(doc=4090)
         0.08294336 = weight(abstract_txt:sciences in 4090) [ClassicSimilarity], result of:
           0.08294336 = score(doc=4090,freq=1.0), product of:
             0.25348842 = queryWeight, product of:
               3.438833 = boost
               5.235323 = idf(docFreq=642, maxDocs=44421)
               0.01408003 = queryNorm
             0.32720768 = fieldWeight in 4090, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.235323 = idf(docFreq=642, maxDocs=44421)
               0.0625 = fieldNorm(doc=4090)
         0.28224537 = weight(abstract_txt:ssci in 4090) [ClassicSimilarity], result of:
           0.28224537 = score(doc=4090,freq=1.0), product of:
             0.53237575 = queryWeight, product of:
               4.4574466 = boost
               8.482592 = idf(docFreq=24, maxDocs=44421)
               0.01408003 = queryNorm
             0.530162 = fieldWeight in 4090, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.482592 = idf(docFreq=24, maxDocs=44421)
               0.0625 = fieldNorm(doc=4090)
       0.44 = coord(11/25)
   

3. Peng, T.-Q.; Zhu, J.J.H.: Where you publish matters most : a multilevel analysis of factors affecting citations of internet studies (2012) 0.36

   0.3590671 = sum of:
     0.3590671 = product of:
       0.8160616 = sum of:
         0.012747599 = weight(abstract_txt:both in 1386) [ClassicSimilarity], result of:
           0.012747599 = score(doc=1386,freq=1.0), product of:
             0.05358904 = queryWeight, product of:
               3.8060317 = idf(docFreq=2684, maxDocs=44421)
               0.01408003 = queryNorm
             0.23787698 = fieldWeight in 1386, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.8060317 = idf(docFreq=2684, maxDocs=44421)
               0.0625 = fieldNorm(doc=1386)
         0.024774704 = weight(abstract_txt:index in 1386) [ClassicSimilarity], result of:
           0.024774704 = score(doc=1386,freq=1.0), product of:
             0.083456986 = queryWeight, product of:
               1.247939 = boost
               4.7496953 = idf(docFreq=1044, maxDocs=44421)
               0.01408003 = queryNorm
             0.29685596 = fieldWeight in 1386, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.7496953 = idf(docFreq=1044, maxDocs=44421)
               0.0625 = fieldNorm(doc=1386)
         0.013586075 = weight(abstract_txt:more in 1386) [ClassicSimilarity], result of:
           0.013586075 = score(doc=1386,freq=1.0), product of:
             0.06400543 = queryWeight, product of:
               1.3384928 = boost
               3.3962307 = idf(docFreq=4044, maxDocs=44421)
               0.01408003 = queryNorm
             0.21226442 = fieldWeight in 1386, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.3962307 = idf(docFreq=4044, maxDocs=44421)
               0.0625 = fieldNorm(doc=1386)
         0.054486606 = weight(abstract_txt:journal in 1386) [ClassicSimilarity], result of:
           0.054486606 = score(doc=1386,freq=3.0), product of:
             0.09786104 = queryWeight, product of:
               1.3513471 = boost
               5.14327 = idf(docFreq=704, maxDocs=44421)
               0.01408003 = queryNorm
             0.5567753 = fieldWeight in 1386, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               5.14327 = idf(docFreq=704, maxDocs=44421)
               0.0625 = fieldNorm(doc=1386)
         0.02045823 = weight(abstract_txt:than in 1386) [ClassicSimilarity], result of:
           0.02045823 = score(doc=1386,freq=1.0), product of:
             0.084087774 = queryWeight, product of:
               1.534172 = boost
               3.8927383 = idf(docFreq=2461, maxDocs=44421)
               0.01408003 = queryNorm
             0.24329615 = fieldWeight in 1386, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.8927383 = idf(docFreq=2461, maxDocs=44421)
               0.0625 = fieldNorm(doc=1386)
         0.044605486 = weight(abstract_txt:social in 1386) [ClassicSimilarity], result of:
           0.044605486 = score(doc=1386,freq=3.0), product of:
             0.09803306 = queryWeight, product of:
               1.6565095 = boost
               4.2031517 = idf(docFreq=1804, maxDocs=44421)
               0.01408003 = queryNorm
             0.4550045 = fieldWeight in 1386, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               4.2031517 = idf(docFreq=1804, maxDocs=44421)
               0.0625 = fieldNorm(doc=1386)
         0.076478995 = weight(abstract_txt:citation in 1386) [ClassicSimilarity], result of:
           0.076478995 = score(doc=1386,freq=2.0), product of:
             0.17693694 = queryWeight, product of:
               2.5697227 = boost
               4.890223 = idf(docFreq=907, maxDocs=44421)
               0.01408003 = queryNorm
             0.43223873 = fieldWeight in 1386, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.890223 = idf(docFreq=907, maxDocs=44421)
               0.0625 = fieldNorm(doc=1386)
         0.10799208 = weight(abstract_txt:journals in 1386) [ClassicSimilarity], result of:
           0.10799208 = score(doc=1386,freq=3.0), product of:
             0.19454552 = queryWeight, product of:
               2.6945586 = boost
               5.1277876 = idf(docFreq=715, maxDocs=44421)
               0.01408003 = queryNorm
             0.5550993 = fieldWeight in 1386, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               5.1277876 = idf(docFreq=715, maxDocs=44421)
               0.0625 = fieldNorm(doc=1386)
         0.09574308 = weight(abstract_txt:impact in 1386) [ClassicSimilarity], result of:
           0.09574308 = score(doc=1386,freq=3.0), product of:
             0.19340524 = queryWeight, product of:
               3.0037663 = boost
               4.572972 = idf(docFreq=1246, maxDocs=44421)
               0.01408003 = queryNorm
             0.49503872 = fieldWeight in 1386, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               4.572972 = idf(docFreq=1246, maxDocs=44421)
               0.0625 = fieldNorm(doc=1386)
         0.08294336 = weight(abstract_txt:sciences in 1386) [ClassicSimilarity], result of:
           0.08294336 = score(doc=1386,freq=1.0), product of:
             0.25348842 = queryWeight, product of:
               3.438833 = boost
               5.235323 = idf(docFreq=642, maxDocs=44421)
               0.01408003 = queryNorm
             0.32720768 = fieldWeight in 1386, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.235323 = idf(docFreq=642, maxDocs=44421)
               0.0625 = fieldNorm(doc=1386)
         0.28224537 = weight(abstract_txt:ssci in 1386) [ClassicSimilarity], result of:
           0.28224537 = score(doc=1386,freq=1.0), product of:
             0.53237575 = queryWeight, product of:
               4.4574466 = boost
               8.482592 = idf(docFreq=24, maxDocs=44421)
               0.01408003 = queryNorm
             0.530162 = fieldWeight in 1386, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.482592 = idf(docFreq=24, maxDocs=44421)
               0.0625 = fieldNorm(doc=1386)
       0.44 = coord(11/25)
   

4. Campanario, J.M.: Self-citations that contribute to the journal impact factor : an investment-benefit-yield analysis (2010) 0.36

   0.35795408 = sum of:
     0.35795408 = product of:
       1.1186066 = sum of:
         0.027917972 = weight(abstract_txt:reports in 124) [ClassicSimilarity], result of:
           0.027917972 = score(doc=124,freq=1.0), product of:
             0.077882454 = queryWeight, product of:
               1.2055405 = boost
               4.5883255 = idf(docFreq=1227, maxDocs=44421)
               0.01408003 = queryNorm
             0.35846293 = fieldWeight in 124, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.5883255 = idf(docFreq=1227, maxDocs=44421)
               0.078125 = fieldNorm(doc=124)
         0.03096838 = weight(abstract_txt:index in 124) [ClassicSimilarity], result of:
           0.03096838 = score(doc=124,freq=1.0), product of:
             0.083456986 = queryWeight, product of:
               1.247939 = boost
               4.7496953 = idf(docFreq=1044, maxDocs=44421)
               0.01408003 = queryNorm
             0.37106994 = fieldWeight in 124, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.7496953 = idf(docFreq=1044, maxDocs=44421)
               0.078125 = fieldNorm(doc=124)
         0.09631963 = weight(abstract_txt:journal in 124) [ClassicSimilarity], result of:
           0.09631963 = score(doc=124,freq=6.0), product of:
             0.09786104 = queryWeight, product of:
               1.3513471 = boost
               5.14327 = idf(docFreq=704, maxDocs=44421)
               0.01408003 = queryNorm
             0.98424906 = fieldWeight in 124, product of:
               2.4494898 = tf(freq=6.0), with freq of:
                 6.0 = termFreq=6.0
               5.14327 = idf(docFreq=704, maxDocs=44421)
               0.078125 = fieldNorm(doc=124)
         0.09559874 = weight(abstract_txt:citation in 124) [ClassicSimilarity], result of:
           0.09559874 = score(doc=124,freq=2.0), product of:
             0.17693694 = queryWeight, product of:
               2.5697227 = boost
               4.890223 = idf(docFreq=907, maxDocs=44421)
               0.01408003 = queryNorm
             0.5402984 = fieldWeight in 124, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.890223 = idf(docFreq=907, maxDocs=44421)
               0.078125 = fieldNorm(doc=124)
         0.1349901 = weight(abstract_txt:journals in 124) [ClassicSimilarity], result of:
           0.1349901 = score(doc=124,freq=3.0), product of:
             0.19454552 = queryWeight, product of:
               2.6945586 = boost
               5.1277876 = idf(docFreq=715, maxDocs=44421)
               0.01408003 = queryNorm
             0.6938741 = fieldWeight in 124, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               5.1277876 = idf(docFreq=715, maxDocs=44421)
               0.078125 = fieldNorm(doc=124)
         0.15450475 = weight(abstract_txt:impact in 124) [ClassicSimilarity], result of:
           0.15450475 = score(doc=124,freq=5.0), product of:
             0.19340524 = queryWeight, product of:
               3.0037663 = boost
               4.572972 = idf(docFreq=1246, maxDocs=44421)
               0.01408003 = queryNorm
             0.7988653 = fieldWeight in 124, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               4.572972 = idf(docFreq=1246, maxDocs=44421)
               0.078125 = fieldNorm(doc=124)
         0.31504187 = weight(abstract_txt:factor in 124) [ClassicSimilarity], result of:
           0.31504187 = score(doc=124,freq=5.0), product of:
             0.3109944 = queryWeight, product of:
               3.8089767 = boost
               5.7988343 = idf(docFreq=365, maxDocs=44421)
               0.01408003 = queryNorm
             1.0130147 = fieldWeight in 124, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               5.7988343 = idf(docFreq=365, maxDocs=44421)
               0.078125 = fieldNorm(doc=124)
         0.26326507 = weight(abstract_txt:distribution in 124) [ClassicSimilarity], result of:
           0.26326507 = score(doc=124,freq=3.0), product of:
             0.34762624 = queryWeight, product of:
               4.411425 = boost
               5.5966744 = idf(docFreq=447, maxDocs=44421)
               0.01408003 = queryNorm
             0.75732225 = fieldWeight in 124, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               5.5966744 = idf(docFreq=447, maxDocs=44421)
               0.078125 = fieldNorm(doc=124)
       0.32 = coord(8/25)
   

5. Leydesdorff, L.; Zhou, P.; Bornmann, L.: How can journal impact factors be normalized across fields of science? : An assessment in terms of percentile ranks and fractional counts (2013) 0.35

   0.3544993 = sum of:
     0.3544993 = product of:
       0.8862483 = sum of:
         0.012747599 = weight(abstract_txt:both in 1532) [ClassicSimilarity], result of:
           0.012747599 = score(doc=1532,freq=1.0), product of:
             0.05358904 = queryWeight, product of:
               3.8060317 = idf(docFreq=2684, maxDocs=44421)
               0.01408003 = queryNorm
             0.23787698 = fieldWeight in 1532, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.8060317 = idf(docFreq=2684, maxDocs=44421)
               0.0625 = fieldNorm(doc=1532)
         0.024774704 = weight(abstract_txt:index in 1532) [ClassicSimilarity], result of:
           0.024774704 = score(doc=1532,freq=1.0), product of:
             0.083456986 = queryWeight, product of:
               1.247939 = boost
               4.7496953 = idf(docFreq=1044, maxDocs=44421)
               0.01408003 = queryNorm
             0.29685596 = fieldWeight in 1532, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.7496953 = idf(docFreq=1044, maxDocs=44421)
               0.0625 = fieldNorm(doc=1532)
         0.07354643 = weight(abstract_txt:distributions in 1532) [ClassicSimilarity], result of:
           0.07354643 = score(doc=1532,freq=1.0), product of:
             0.17238447 = queryWeight, product of:
               1.79354 = boost
               6.82627 = idf(docFreq=130, maxDocs=44421)
               0.01408003 = queryNorm
             0.42664188 = fieldWeight in 1532, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.82627 = idf(docFreq=130, maxDocs=44421)
               0.0625 = fieldNorm(doc=1532)
         0.11100456 = weight(abstract_txt:variance in 1532) [ClassicSimilarity], result of:
           0.11100456 = score(doc=1532,freq=1.0), product of:
             0.22682153 = queryWeight, product of:
               2.0573308 = boost
               7.8302665 = idf(docFreq=47, maxDocs=44421)
               0.01408003 = queryNorm
             0.48939165 = fieldWeight in 1532, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.8302665 = idf(docFreq=47, maxDocs=44421)
               0.0625 = fieldNorm(doc=1532)
         0.13554165 = weight(abstract_txt:skewed in 1532) [ClassicSimilarity], result of:
           0.13554165 = score(doc=1532,freq=1.0), product of:
             0.25912276 = queryWeight, product of:
               2.1989472 = boost
               8.369263 = idf(docFreq=27, maxDocs=44421)
               0.01408003 = queryNorm
             0.5230789 = fieldWeight in 1532, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.369263 = idf(docFreq=27, maxDocs=44421)
               0.0625 = fieldNorm(doc=1532)
         0.108157635 = weight(abstract_txt:citation in 1532) [ClassicSimilarity], result of:
           0.108157635 = score(doc=1532,freq=4.0), product of:
             0.17693694 = queryWeight, product of:
               2.5697227 = boost
               4.890223 = idf(docFreq=907, maxDocs=44421)
               0.01408003 = queryNorm
             0.6112779 = fieldWeight in 1532, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               4.890223 = idf(docFreq=907, maxDocs=44421)
               0.0625 = fieldNorm(doc=1532)
         0.10799208 = weight(abstract_txt:journals in 1532) [ClassicSimilarity], result of:
           0.10799208 = score(doc=1532,freq=3.0), product of:
             0.19454552 = queryWeight, product of:
               2.6945586 = boost
               5.1277876 = idf(docFreq=715, maxDocs=44421)
               0.01408003 = queryNorm
             0.5550993 = fieldWeight in 1532, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               5.1277876 = idf(docFreq=715, maxDocs=44421)
               0.0625 = fieldNorm(doc=1532)
         0.0781739 = weight(abstract_txt:impact in 1532) [ClassicSimilarity], result of:
           0.0781739 = score(doc=1532,freq=2.0), product of:
             0.19340524 = queryWeight, product of:
               3.0037663 = boost
               4.572972 = idf(docFreq=1246, maxDocs=44421)
               0.01408003 = queryNorm
             0.40419742 = fieldWeight in 1532, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.572972 = idf(docFreq=1246, maxDocs=44421)
               0.0625 = fieldNorm(doc=1532)
         0.11271281 = weight(abstract_txt:factor in 1532) [ClassicSimilarity], result of:
           0.11271281 = score(doc=1532,freq=1.0), product of:
             0.3109944 = queryWeight, product of:
               3.8089767 = boost
               5.7988343 = idf(docFreq=365, maxDocs=44421)
               0.01408003 = queryNorm
             0.36242715 = fieldWeight in 1532, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.7988343 = idf(docFreq=365, maxDocs=44421)
               0.0625 = fieldNorm(doc=1532)
         0.12159693 = weight(abstract_txt:distribution in 1532) [ClassicSimilarity], result of:
           0.12159693 = score(doc=1532,freq=1.0), product of:
             0.34762624 = queryWeight, product of:
               4.411425 = boost
               5.5966744 = idf(docFreq=447, maxDocs=44421)
               0.01408003 = queryNorm
             0.34979215 = fieldWeight in 1532, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.5966744 = idf(docFreq=447, maxDocs=44421)
               0.0625 = fieldNorm(doc=1532)
       0.4 = coord(10/25)