Ergebnisse von PULSS (Projekt für die Untersuchung des Lernens in der Sekundarstufe; durchgeführt ab 2008 in Bayern und Baden-Württemberg):
„Regarding environmental factors, the gifted classes provided a better social climate for gifted children than the regular classes; gifted pupils participating in gifted classes reported decreasing levels of aversion toward school compared with the levels they had indicated for their primary-school experiences.“
Univ.-Prof. Dr. Albert Ziegler u. a., „Gifted Education in German-Speaking Europe“. In: „Journal for the Education of the Gifted“ (2013) 36(3), S. 399