Language testing ; Kindersprache (pathol.) ; Child language (pathol.) ; Specific language impairment; SLI; Dysgrammatismus (Kindersprache) ; Dysgrammatism (child language) ; Handicapped language acquisition ; Spracherwerb und neurologische Entwicklung; Language acquisition and neurological development; Sprache und Denken (Ontogenese) ; Language and thought (ontogenesis) ; Cognitive development; Language acquisition and cognitive development ; Asperger's syndrome ; Autism ; Pragmatic competence (pathol.) ; Pragmatische Kompetenz (pathol.) ; Communicative competence (pathol.) ; Kommunikative Kompetenz (pathol.) ; Conversational analysis (pathol.)