A variation of the calculation of the first author cocitation strength in author cocitation analysis

The method of author cocitation analysis (ACA) was first presented by White and Griffith in 1981 as a "literature measure of intellectual structure" and its applicability for the mapping of areas of science has since then been tested in various bibliometric science mapping studies. In this study, an experimental method of calculating the first or single author cocitation frequency is presented and compared with the standard method. Applying Ward's method of clustering, the analysis revealed that the two approaches did not produce similar results and a tentative interpretation of deviations was that the experimental method provided with a more detailed depiction of the specialty structure. It was also concluded that a number of additional research questions need to be resolved before a comprehensive understanding of the suggested method's merits and demerits is reached.