„The event of grade retention and repetition seems to be perceived rather as an opportunity than a critical event with regard to students‘ well-being, in particular for boys and grammar schools students. Despite the change of from [sic] the previous familiar class environment, grade repetition affects well-being of retained students mostly in a positive manner. As a conclusion of this study, the event of grade repetition and retention should not be classified overhasty as not having any positive effects on students´ well-being.“
Prof. Dr. Katharina Rathmann u.a., Critical Events throughout the Educational Career: The Effect of Grade Retention and Repetition on School-Aged Children’s Well-Being (2020), S. 23.