Children have been shown to rely on such distributional information for syntactic categorization from around 12 to 16 months (Höhle et al., 2004;Mintz, 2006).
german 16 month-olds use determiners to correctly categorize words as nouns even when the kind of determiner was different during familiarization and test (Höhle et al., 2004), making it necessary to generalize.