Intentionality (language acquisition) ; Sprachentwicklungsverzögerung; Language delay ; Metalinguistic awareness (in children) ; Phonics (teaching of) ; Phonologische Bewusstheit (bei Kindern) ; Phonological awareness (in children) ; Focus on form (language teaching) ; Sprachbewusstsein (bei Kindern) ; Linguistic awareness (in children) ; Spracherwerb und neurologische Entwicklung; Language acquisition and neurological development; Sprache und Denken (Ontogenese) ; Language and thought (ontogenesis) ; Cognitive development; Language acquisition and cognitive development ; Vermeidungsstrategie (pathol.) ; Avoidance strategy (pathol.) ; Compensatory strategy (pathol.) ; Speaker strategy (pathol.)