Ethik (Forschung) ; Ethics (in research) ; Research ethics ; Abuse; Child abuse; Kindesmisshandlung; Violence ; Kindersprache (pathol.) ; Child language (pathol.) ; Specific language impairment; SLI; Dysgrammatismus (Kindersprache) ; Dysgrammatism (child language) ; Handicapped language acquisition ; Critical period (language acquisition) ; Alter (Einfluss auf Spracherwerb) ; Age (influence on language acquisition) ; Age of acquisition; AoA; Sensitive period (language acquisition) ; Auditory brainstem implant; Elektrisch-akustische Stimulation; Electric-acoustic stimulation; Cochlear implant