Figure 2
The network displays multiple clusters of nodes, each represented by circles labeled with author names and publication years, connected by thin curved lines. On the upper-left side, a large blue cluster contains numerous interconnected nodes such as “hatlevik o.e. (2015 b)”, “hatlevik o.e. (2015 a)”, “halász g. (2011)”, “pepper d.(2011)”, “takayama k. (2013)”, “schleicher a. (2007)”, “olmos rueda p. (2013)”, “wilson-daily a.e. (2021)”, and “moon y.l. (2007)”. These nodes form dense webs of overlapping connections, with several links extending outward toward other clusters. Below this blue cluster, a green cluster appears, containing authors such as “biemans h. (2004)”, “mulder m. (2009)”, “van dinther m. (2014)”, “winters a. (2009)”, “de bruijn e. (2012)”, “misbah z. (2022)”, and “matlay h. (2002)”. The green nodes form a branching pattern of lines that connect within the cluster and also reach upward toward blue nodes and rightward toward the red cluster. On the right side, a dense red cluster contains nodes such as “murga-menoyo m.a. (2014)”, “wiek a. (2011)”, “rieckmann m. (2012)”, “bridges d. (1996)”, “ojala m. (2017)”, “crick r.d. (2008)”, “hyland.t (1997)”, “hyland t.(1994 b)”, and “azevedo a. (2012). These nodes are tightly interconnected with many short lines crisscrossing the group, forming a dense network. The red cluster is much more denser as compared to the other two clusters. The logo of “V O S viewer” is visible on the bottom left.The main streams of competence-based education and training research. Source: VOSviewer