“…This means that the reason that is usually given to explain any negative effects of grade repetition on school performance is not substantiated. After all, it is often assumed that the awareness of being retained has such a negative effect on the self-concept and the motivation of the student that school performance is more likely to suffer (Alexander, Entwistle, & Dauber, 2003;Kretschmann, Vock, Lüdtke, Jansen, & Gronostaj, 2019). However, on the basis of research into social comparison theories (Huguet et al, 2009) and the extensively studied and robust 'Big-Fish-Little-Pond-Effect' (BFLPE) (Marsh, 1987;Marsh et al, 2014), one may expect that a pupil who, by repeating a grade, performs better in comparison with the new class group will experience a more favorable self-concept and associated well-being (Marsh, 2016).…”