Metalinguistic awareness; Phonologische Bewusstheit; Phonological awareness; Focus on form (language teaching) ; Sprachbewusstsein; Linguistic awareness ; Sprachperzeption/Sprachproduktion (Asymmetrie von) ; Language perception/language production (disparity in) ; Active vocabulary/passive vocabulary; Passive vocabulary; Disparity; Language production/language perception (disparity in) ; Second language acquisition (psycholing.) ; Zweitspracherwerb (lex.) ; Second language acquisition (lex.) ; Vocabulary (second language acquisition)