Reliability (method.) ; Ultraschall; Echographie; Doppler-Sonographie; Ultrasound; Sonography (neuroling.) ; Laterality; Sinistrality; Lateralization ; Neuroanatomie; Neuroanatomy; Spiegelneuron; Mirror neuron; Neurophysiology ; Sprachperzeption (neuroling.) ; Speech perception (neuroling.) ; Language processing (neuroling.) ; Sprachverständnis (neuroling.) ; Speech production/speech perception (neuroling.) ; Story telling (in 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 ; Kindersprache (Sprachverständnis) ; Children's comprehension of language; Language comprehension in children ; Holländisch; Dutch