Measuring the intellectual diversity encoded in publication records as a
proxy to the degree of interdisciplinarity has recently received considerable
attention in the science mapping community. The present paper draws upon the
use of the Stirling index as a diversity measure applied to a network model
(customized science map) of research profiles, proposed by several authors. A
modified version of the index is used and compared with the previous versions
on a sample data set in order to rank top Hungarian research organizations
(HROs) according to their research performance diversity. Results, unexpected
in several respects, show that the modified index is a candidate for measuring
the degree of polarization of a research profile. The study also points towards
a possible typology of publication portfolios that instantiate different types
of diversity
