The Research Impact of
          Open Access Journal Articles

                               Yaşar Tonta, Yurdagül Ünal &...
Outline

          Some definitions
                 Open Access
                 Research impact
                 The nat...
Related Terms

     Open Access: “Free …[online, full-text]
     access” to scientific publications

     Research impact:...
The Nature of Scientific Disciplines


      Hard                                                                         ...
Research Questions

             Does the research impact of OA articles
             differ across the fields in sciences...
Methodology

          DOAJ journals
          Journal selection criteria
          Nine disciplines
          Sample




...
The Nature of Scientific Disciplines


  Physics                                                     Economics            ...
Sample
                                                            # of journals
     Subjects                            ...
Scopus




                                                                                                           -9
E...
Descriptive Statistics

          270 articles were cited 761 times
          Articles with zero citations = 95 (35%)
    ...
Distribution of Citations by Subjects N=761
       210
                                                                   ...
Self-citation Rates
         50
                                   46
         45         43
                             ...
Obsolescence for OA Articles
    30


    25


    20
%




    15


    10


    5


    0
         0             1      ...
Half-life for OA Articles
          2 years
                        Physics
                        Mathematics
          ...
Conclusion

             Citation characteristics vary among
             disciplines
             Citation behavior diffe...
Further Research

             A more representative study with a larger
             sample size needs to be carried out
...
The Research Impact of
          Open Access Journal Articles

                               Yaşar Tonta, Yurdagül Ünal &...
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The Research Impact of Open Access Journal Articles

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ELPUB 2007, the 11th International Conference on Electronic Publishing, 13-15 June 2007, Vienna, Austria

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The Research Impact of Open Access Journal Articles

  1. 1. The Research Impact of Open Access Journal Articles Yaşar Tonta, Yurdagül Ünal & Umut Al Department of Information Management Hacettepe University Ankara, Turkey {tonta, yurdagul, umutal}@hacettepe.edu.tr -1 ELPUB 2007, the 11th International Conference on Electronic Publishing, 13-15 June 2007, Vienna, Austria
  2. 2. Outline Some definitions Open Access Research impact The nature of scientific disciplines Methodology Findings Conclusion -2 ELPUB 2007, the 11th International Conference on Electronic Publishing, 13-15 June 2007, Vienna, Austria
  3. 3. Related Terms Open Access: “Free …[online, full-text] access” to scientific publications Research impact: Number of times that each article is cited in literature Hard/soft; urban/rural; convergent/divergent scientific disciplines -3 ELPUB 2007, the 11th International Conference on Electronic Publishing, 13-15 June 2007, Vienna, Austria
  4. 4. The Nature of Scientific Disciplines Hard Soft Urban Rural Convergent Divergent Physics Biology Anthropology -4 ELPUB 2007, the 11th International Conference on Electronic Publishing, 13-15 June 2007, Vienna, Austria
  5. 5. Research Questions Does the research impact of OA articles differ across the fields in sciences, social sciences, and arts and humanities? If it does, do OA articles in hard, urban and convergent fields receive more citations (hence higher research impact) than those in soft, rural, and divergent ones? -5 ELPUB 2007, the 11th International Conference on Electronic Publishing, 13-15 June 2007, Vienna, Austria
  6. 6. Methodology DOAJ journals Journal selection criteria Nine disciplines Sample -6 ELPUB 2007, the 11th International Conference on Electronic Publishing, 13-15 June 2007, Vienna, Austria
  7. 7. The Nature of Scientific Disciplines Physics Economics Psychology Mathematics Env. Sci. Sociology Chem. Eng. Biology Anthropology hard, urban, convergent soft, rural, divergent -7 ELPUB 2007, the 11th International Conference on Electronic Publishing, 13-15 June 2007, Vienna, Austria
  8. 8. Sample # of journals Subjects in the sample # of total articles sample rate Physics 6 2,543 1.2 Mathematics 16 1,092 2.7 Chemical Engineering 3 818 3.7 Economics 2 113 26.5 Environmental Sciences 3 247 12.1 Biology 7 690 4.3 Psychology 4 271 11.1 Sociology 3 97 30.9 Anthropology 2 111 27.0 -8 ELPUB 2007, the 11th International Conference on Electronic Publishing, 13-15 June 2007, Vienna, Austria
  9. 9. Scopus -9 ELPUB 2007, the 11th International Conference on Electronic Publishing, 13-15 June 2007, Vienna, Austria
  10. 10. Descriptive Statistics 270 articles were cited 761 times Articles with zero citations = 95 (35%) Average number of citations Biology 6.4 Economics 5.1 Psychology 0.9 Sociology 0.8 - 10 ELPUB 2007, the 11th International Conference on Electronic Publishing, 13-15 June 2007, Vienna, Austria
  11. 11. Distribution of Citations by Subjects N=761 210 192 180 154 150 120 98 N 95 90 63 63 60 44 28 30 24 0 Physics Mathematics Chemical Economics Environmental Biology Psychology Sociology Anthropology Engineering Sciences subjects hard, urban, convergent soft, rural, divergent - 11 ELPUB 2007, the 11th International Conference on Electronic Publishing, 13-15 June 2007, Vienna, Austria
  12. 12. Self-citation Rates 50 46 45 43 40 40 40 35 30 30 % 25 23 21 20 15 14 10 7 5 0 Physics Mathematics Chem ical Economics Environmental Biology Psychology Sociology Anthropology Engineering Sciences subjects hard, urban, convergent soft, rural, divergent - 12 ELPUB 2007, the 11th International Conference on Electronic Publishing, 13-15 June 2007, Vienna, Austria
  13. 13. Obsolescence for OA Articles 30 25 20 % 15 10 5 0 0 1 2 3 4 5 6 7 8 year - 13 ELPUB 2007, the 11th International Conference on Electronic Publishing, 13-15 June 2007, Vienna, Austria
  14. 14. Half-life for OA Articles 2 years Physics Mathematics Biology Psychology 3 years Chemical Engineering Economics Environmental Sciences Sociology Anthropology - 14 ELPUB 2007, the 11th International Conference on Electronic Publishing, 13-15 June 2007, Vienna, Austria
  15. 15. Conclusion Citation characteristics vary among disciplines Citation behavior differs from self-archiving behavior OA articles in hard, urban and convergent fields do not necessarily have higher research impact OA articles in Biology, Economics and Anthropology received more citations - 15 ELPUB 2007, the 11th International Conference on Electronic Publishing, 13-15 June 2007, Vienna, Austria
  16. 16. Further Research A more representative study with a larger sample size needs to be carried out The relationship between research impact and self-archiving behavior should be investigated - 16 ELPUB 2007, the 11th International Conference on Electronic Publishing, 13-15 June 2007, Vienna, Austria
  17. 17. The Research Impact of Open Access Journal Articles Yaşar Tonta, Yurdagül Ünal & Umut Al Department of Information Management Hacettepe University Ankara, Turkey {tonta, yurdagul, umutal}@hacettepe.edu.tr - 17 ELPUB 2007, the 11th International Conference on Electronic Publishing, 13-15 June 2007, Vienna, Austria

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