Evaluation criterion (language teaching) ; Deaf education; Einsprachige Methode (Gehörlosenunterricht) ; German method (Deaf education) ; Deutsche Methode (Gehörlosigkeit) ; Monolingual method (Deaf education) ; Deaf education; Bicultural education (Deaf education) ; Bilingual education (Deaf education) ; Simulation theory; Theory theory; Other minds ; Spracherwerb und neurologische Entwicklung; Language acquisition and neurological development; Sprache und Denken (Ontogenese) ; Language and thought (ontogenesis) ; Cognitive development; Language acquisition and cognitive development ; Taubheit; Deafness