Fig. 1

The “Big-Fish-Little-Pond-Effect” (BFLPE) [12]. Modified according to Köller [12]; the size of the fishes represent students’ level of self-concept. Graphics are obtained from http://www.clipartbest.com/clipart-pT5okjabc. The present study used students´ self-reported perceived school performance as data on objective measures of school performance was not available. Thus, the figure only demonstrates the original effect of the Big-Fish-Little-Pond-hypothesis according to previous studies, using test scores or other objective measures of school performance