PPVT; Echelle de vocabulaire en images Peabody; EVIP; Test de Vocabulario en Imagenes Peabody; TVIP ; Family communication ; Wortbedeutung (Spracherwerb) ; Bedeutungsentwicklung; Semantic development ; Baby talk; Motherese; Child-directed speech; Ammensprache; Babysprache; Infant-directed speech; Fatherese; Language spoken to children ; Spracherwerb (lex.) ; Language acquisition (lex.) ; Vocabulary (language acquisition) ; English