Learning theory ; Word memory ; Intentionality (language acquisition) ; Anaphora (Spracherwerb) ; Reference (language acquisition) ; Kindersprache (Sprachgedächtnis) ; Children's verbal memory; Verbal memory in children ; Spracherwerb (lex.) ; Language acquisition (lex.) ; Vocabulary (language acquisition) ; English (American) ; USA (English language in the) ; USA (engl. Sprache in den) ; English in the USA; Englisch in den USA; American English