caa a22 4500 445348038 CHVBK 20180317142835.0 cr unu---uuuuu 170323e20110401xx s 000 0 eng 10.1007/s11192-010-0332-3 doi (NATIONALLICENCE)springer-10.1007/s11192-010-0332-3 Q-measures and betweenness centrality in a collaboration network: a case study of the field of informetrics [Elektronische Daten] [Raf Guns, Yu Liu, Dilruba Mahbuba] We study global and local Q-measures, as well as betweenness centrality, as indicators of international collaboration in research. After a brief review of their definitions, we introduce the concepts of external and internal inter-group geodesics. These concepts are applied to a collaboration network of 1129 researchers from different countries, which is based on publications in bibliometrics, informetrics, webometrics, and scientometrics (BIWS in short) from the period 1990-2009. It is thus illustrated how international collaboration (among authors from different countries) in BIWS is carried out. Our results suggest that average scores for local Q-measures are typically higher, indicating a relatively low degree of international collaboration in BIWS. The dominating form of international collaboration is bilateral, whereas multilateral collaboration is relatively rare in the field of BIWS. We also identify and visualize the most important global and local actors. Dividing the entire period in four 5-year periods, it is found that most international collaboration in the field has happened in the last time slice (2005-2009). A comparison of the different time slices reveals the non-linear growth of the indicators studied and the international expansion of the field. Akadémiai Kiadó, Budapest, Hungary, 2010 Co-author collaborative network nationallicence Globalization nationallicence Global Q-measure nationallicence Local Q-measure nationallicence Betweenness nationallicence External inter-group geodesic nationallicence Internal inter-group geodesic nationallicence Evolvement of network nationallicence Guns Raf University of Antwerp, IBW, Venusstraat 35, City Campus, B-2000, Antwerpen, Belgium aut Liu Yu University of Antwerp, IBW, Venusstraat 35, City Campus, B-2000, Antwerpen, Belgium aut Mahbuba Dilruba University of Antwerp, IBW, Venusstraat 35, City Campus, B-2000, Antwerpen, Belgium aut Scientometrics Springer Netherlands 87/1(2011-04-01), 133-147 0138-9130 87:1<133 2011 87 11192 https://doi.org/10.1007/s11192-010-0332-3 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11192-010-0332-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Guns Raf University of Antwerp, IBW, Venusstraat 35, City Campus, B-2000, Antwerpen, Belgium aut NATIONALLICENCE 700 1- Liu Yu University of Antwerp, IBW, Venusstraat 35, City Campus, B-2000, Antwerpen, Belgium aut NATIONALLICENCE 700 1- Mahbuba Dilruba University of Antwerp, IBW, Venusstraat 35, City Campus, B-2000, Antwerpen, Belgium aut NATIONALLICENCE 773 0- Scientometrics Springer Netherlands 87/1(2011-04-01), 133-147 0138-9130 87:1<133 2011 87 11192 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer