Learning disability ; Soziokognition; Social cognition; Discursive psychology; Social psychology ; Case study (language acquisition) ; Baby talk; Motherese; Child-directed speech; Ammensprache; Babysprache; Infant-directed speech; Fatherese; Language spoken to children ; Pragmatic competence (pathol.) ; Pragmatische Kompetenz (pathol.) ; Communicative competence (pathol.) ; Kommunikative Kompetenz (pathol.) ; Conversational analysis (pathol.) ; English (American) ; USA (English language in the) ; USA (engl. Sprache in den) ; English in the USA; Englisch in den USA; American English