Do Science Researchers Use Books Nisa Bakkalbasi Science Electronic Resources Librarian Purchase College State University of New York nisa bakkalbasi purchase edu David Goodman Associate Professor P

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Do Science Researchers Use Books Nisa Bakkalbasi Science Electronic Resources Librarian Purchase College State University of New York nisa bakkalbasi purchase edu David Goodman Associate Professor P Powered By Docstoc
					Do Science Researchers Use Books?

   Nisa Bakkalbasi
   Science/Electronic Resources Librarian
   Purchase College
   State University of New York
   nisa.bakkalbasi@purchase.edu

   David Goodman
   Associate Professor
   Palmer School of Library and Information Science
   Long Island University
   david.goodman@liu.edu

   XXIV Annual Charleston Conference: Issues in Books and Serials Acquisition
                          Charleston, South Carolina
                               November 2004
Introduction
 In this study we examine citation data for
  books that have been cited in the journal
  articles that were published by authors at a
  large university during 1981-2001
 Most recent investigations have examined
  use of journal articles, not books.
 Local citation data as a measure of book
  use.



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Data Source

      Results are based on citation data extracted from
      Web of Science.
      A sample record from raw data containing 1,441
      records.

    ABBREVIATED TITLE   '01 '00 '99 '98 '97 '96 '95 '94 '93 '92 '91 '90 '89 '88 '87 '86 '85 '84 '83 '82 '81
MOL CLONING LABORATO      5 14 23 15 12 9 20 9 13 10 8 3 1 12 11 5 5 2 0 0




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Data Source

The dataset have undergone a detailed processing and
cleaning.

We excluded all records with less than 8 citations.

FULL TITLE                             AUTHOR                                              0
                                                        PUBLISHER PUB. DATE LC CODE CITATIONS1    2   3 4   5   6   7
Molecular cloning : a laboratory ...   Maniatis, EF     CSH P       1982    QH442 …   177   0 0   2   5 5 11 12     1




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Descriptive Statistics

A total number of 1,132 titles are analyzed.

The total number of citations for all titles is 17,657.


                                 No. of Citations


Number of                                           Standard Coefficient of
  Titles  Minimum   Maximum     Mean Median         Deviation  Variation
  1132        8       180       15.6   11             13.11      0.84



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Frequency Distribution of Citations




              Few books are cited very often while
              many others are cited rarely.




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Cumulative Frequency Distribution

                          100%
                          90%
 Cumulative percentages




                          80%
                          70%
                          60%
                          50%
                                               80% are cited ≤19 times
                          40%
                          30%
                          20%
                          10%
                           0%
                                 0   15   30    45    60     75    90    105     120   135   150   165   180

                                                           Number of citations




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Number of Citations by Subject
Physics yielded the highest number of titles and citations
whereas Biology has the highest average number of citations.


                                      Total    Average
                     Number of     number of number of      Percent of
Discipline             titles       citations  citations     citations
Physics                      171          2604       15.2           14.7
Mathematics                  131          2282       17.4           12.9
Social Sciences              146          1851       12.7           10.5
Biology                       85          1832       21.6           10.4
Astronomy                     68          1086       16.0            6.2



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                         November 2004
      Top 10 Titles

                                                                                         Published
Full Title                                                           Author                Date      Discipline
Numerical recipes: the art of scientific computing                   Press, WH et al       1986      Mathematics
Molecular cloning : a laboratory manual                              Maniatis, EF          1982      Biology
                                                                      biology
Escherichia coli and Salmonella typhimurium : cellular and molecularNeidhardt, FC          1987      Biology
Methods in yeast genetics : a Cold Spring Harbor Laboratory course manual                  1985      Zoology & Botany
                                                                     Garey, MR et al
Computers and intractability : a guide to the theory of NP-completeness                    1979      Mathematics
Quantum Hall effect, the                                             Prange, RE et al      1987      Physics
                                                                     Williams, FA
Combustion theory : the fundamental theory of chemically reacting flow systems             1985      Chemistry
Drosophila : a practical approach                                    Roberts, DB           1986      Biology
Numerical recipes in C : the art of scientific computing             Press, WH et al       1988      Mathematics
Experiments with gene fusions                                        Silhavy, TJ et al     1984      Biology




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Top 10 Publishers




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Citation Age
The citation age is calculated by subtracting the year of publication
of the cited book from the year of publication of the citing article.

                 Age       Total No. of            Percent of
             (in years)     Citations              Citations
                 0-4               5,034                   28.5
                 5-9               5,786                   32.8
                10-14              3,990                   22.6
                15-19              1,957                   11.1
                20-24                422                    2.4
                25-29                 32                    0.2
                 >29                 436                    2.5
                                 17,657                   100.0
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Citation Age by Selected Disciplines
 Biology and Physics appear to be representative of all
 disciplines.
                            Percent of Citations
            Age
        (in years)   All Disciplines Biology Physics
            0-4                 28.5    28.9    27.0
            5-9                 32.8    32.6    31.0
           10-14                22.6    24.3    22.7
           15-19                11.1    11.8    12.4
           20-24                  2.4     2.0    3.6
           25-29                  0.2     0.3    0.3
            >29                   2.5     0.0    2.9

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Citation Age by Selected Disciplines
 Mathematics and Astronomy appear to behave
 differently at early ages.
                            Percent of Citations
        Age
    (in years)   All Disciplines Mathematics Astronomy
        0-4                 28.5        18.3       43.3
        5-9                 32.8        34.7       32.0
       10-14                22.6        28.7       16.9
       15-19                11.1        13.7        4.8
       20-24                  2.4        3.5        1.8
       25-29                  0.2        0.0        0.0
        >29                   2.5        1.1        1.3

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                         November 2004
Lifespan of a Book
                               600



                               500
   Total Number of Citations




                               400



                               300

                                                                 Book citations increase
                               200                               rapidly within the first 4
                                                                 years of its lifespan
                               100



                                0
                                     0   1   2     3    4    5     6   7   8     9   10   11    12   13   14

                                                 The First 15 Years in the Lifespan of a Book

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Summary
 The citation data conforms to Zipf’s
  Law.
 Most citations are to recent titles with
  observable similarities and differences
  across different scientific disciplines.
 On average, citations increase rapidly
  within the first 4 years of publication
  date.
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Conclusion

 Researchers are citing books.
 Scientists still rely on books while
  performing research as a source of
  information.




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Thank you!