DaF; Deutsch als Zweitsprache; German as a second language; DaZ; German as a foreign language ; Strategie (Lerntheorie) ; Strategy (learning theory) ; Learning strategy ; Sprachpsychologie; Psycholinguistics ; Second language acquisition (psycholing.) ; Zweitspracherwerb (lex.) ; Second language acquisition (lex.) ; Vocabulary (second language acquisition) ; German