Language testing ; Erstspracherwerb; First language acquisition; Ontogenese; Language acquisition ; Kindersprache (Sprachverständnis) ; Children's comprehension of language; Language comprehension in children ; Auditory brainstem implant; Elektrisch-akustische Stimulation; Electric-acoustic stimulation; Cochlear implant ; Taubheit; Deafness ; Instrumental speech aids; Apparative Sprechhilfe; Hörhilfe (apparative) ; Hearing aids (instrumental) ; Electrolarynx; Elektrolarynx; Voice output communication aids; Speech aids/Hearing aids (instrumental) ; English
