New paper

[Gjemma Derrick]

Hi Simon
May be of interest.
tak,
gj




Bornmann Lutz wrote:
>
> Dear Gjemma,
>
>
> Please find attached a recently published paper (pdf-file) that might 
> be of interest to you:
>
> Bornmann, L. & Daniel, H.-D. (2009). Universality of citation 
> distributions – A validation of Radicchi et al.’s relative indicator 
> /c_f = c/c_0 / at the micro level using data from chemistry. /Journal 
> of the American Society for Information Science and Technology, 
> 60/(8), 1664–1670.
>
> Abstract: In a recently published PNAS paper, Radicchi, Fortunato, and 
> Castellano (2008) propose the relative indicator /cf /as an unbiased 
> indicator for citation performance across disciplines (fields, subject 
> areas). To calculate /cf /, the citation rate for a single paper is 
> divided by the average number of citations for all papers in the 
> discipline in which the single paper has been categorized. /cf /values 
> are said to lead to a universality of discipline-specific citation 
> distributions. Using a comprehensive dataset of an evaluation study on 
> /Angewandte Chemie International Edition /(AC-IE), we tested the 
> advantage of using this indicator in practical application at the 
> micro level, as compared with (1) simple citation rates, and (2) 
> /z/-scores, which have been used in psychological testing for many
>
> years for normalization of test scores. To calculate /z/scores, the 
> mean number of citations of the papers within a discipline is 
> subtracted from the citation rate of a single paper, and the 
> difference is then divided by the citations’ standard deviation for a 
> discipline. Our results indicate that /z/-scores are better suited 
> than /cf /values to produce universality of discipline-specific 
> citation distributions.
>
>
> Sincerely yours,
>
>
> Lutz Bornmann
>
> -------------------------------------------------------------------------------------------------------------
>
> Dr. Lutz Bornmann
> ETH Zurich, D-GESS
> Professorship for Social Psychology and Research on Higher Education
> Zaehringerstr. 24 / ZAE
> CH-8092 Zurich
>
> Phone: 0041 44 632 48 25
> Fax: 0041 44 632 12 83
>
> http://www.psh.ethz.ch/ <http://www.psh.ethz.ch/index_EN>
> bornmann at gess.ethz.ch <mailto:bornmann at gess.ethz.ch>
>