“…Thus, the adaptation of the MDS configuration with dimensionality 2 to the raw data can be assessed as being acceptable after a comparison with the simulation results from Borg and Groenen (2005, chapter 3). For the interpretation of the dimensions of the MDS configuration, reference is made to the data set in Figure 1, for one, and to the relevant literature on computer science education, for another (Nievergelt, 1980(Nievergelt, , 1990Schwill, 1994;Gal-Ezer & Harel, 1999;Tucker et al, 2003Tucker et al, , 2006Denning, 2003;GI, 2008;Zendler & Spannagel, 2008).…”