Language testing ; Productivity rate (of rules) ; Rule (theory of grammar) ; Emotive communication; Expressive use of language ; Wortassoziation; Neighborhood (phonem.) ; Neighborhood (semant.) ; Verbal association ; Spracherwerb und neurologische Entwicklung; Language acquisition and neurological development; Sprache und Denken (Ontogenese) ; Language and thought (ontogenesis) ; Cognitive development; Language acquisition and cognitive development ; Sprachfehler; Language attrition (pathol.) ; Language loss (pathol.) ; Sprachverlust (pathol.) ; Speech pathology ; Error analysis (pathol.) ; Williams syndrome ; Verbal memory (pathol.) ; Imperfekt; Imperfect; Imparfait; Preterite; Indefinido; Past tense ; Unregelmässige Verben; Irregular verbs ; Interface, morphology-syntax ; English