“…In view of the educational placement of students with SEN in mainstream schools, a major challenge and goal for education policy and educators is the successful social inclusion of these children. The importance of the topic has been emphasized in previous studies, where it is assumed that students with SEN are an at-risk group for social exclusion in mainstream schools (Frostad et al, 2011;Krull et al, 2014;Garrote et al, 2017;Henke et al, 2017). However, proper conceptualization and measurement of social inclusion of students with SEN is the subject of an ongoing debate (Chambers and Kay, 1992;Frederickson et al, 2007;Koster et al, 2009;Gerullis and Huber, 2018).…”