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This article should not be speedily deleted for lack of asserted importance because B. Nagengast is one of Europe´s leading educational psychologists working closely together with Herbert W. Marsh at Oxford University for several years. Furthermore, he is editorial board member of two leading magazines in education science, one British, one American. Nagengast has published numerous articles in class A journals and is a Full Professor at one of Germany´s leading universities. All references needed are added in the meantime. --Eberhard Graf — Preceding unsigned comment added by Eberhard Graf (talk • contribs) 20:00, February 4, 2018 (UTC)
