Grammatizität; Grammaticalness ; Sprachperzeption/Sprachproduktion (Asymmetrie von) ; Language perception/language production (disparity in) ; Active vocabulary/passive vocabulary; Passive vocabulary; Disparity; Language production/language perception (disparity in) ; Child language ; Kindersprache (Sprachverständnis) ; Children's comprehension of language; Language comprehension in children ; Tense (synt.) ; English