effet (3) âge (3) Age (3) Age (3) association (2) modèle (2) analyse (2) Economic conditions (2) Development (2) Language (2) Children (2) Aspect (2) Acquisition (2) Methods (2) Socioeconomic status (2) Social status (2) Social groups (2) Mediation (2) Manufacturers' agents (2) Language acquisition (2) Example (2) Evidence (2) Education (2) Diseases--Causes and theories of causation (2) Commission merchants (2) Children (2) Ability (2) Methods (2) Analysis (2) Social conditions (2)