title: Polish children's productivity with case marking: the role of regularity, type frequency, and phonological diversity.
abstract: 57 Polish-speaking children aged from 2;4, to 4;8 and 16 adult controls participated in a nonce-word inflection experiment testing their ability to use the genitive, dative and accusative inflections productively. Results show that this ability develops early: the majority of two-year-olds were already productive with all inflections apart from dative neuter; and the overall performance of the four-year-olds was very similar to that of adults. All age groups were more productive with inflections that apply to large and/or phonologically diverse classes, although class size and token frequency appeared to be more important for younger children (two- and three-year-olds) and phonological diversity for older children and adults. Regularity, on the other hand, was a very poor predictor of productivity. The results support usage-based models of language acquisition and are problematic for the dual mechanism model.
authors.affiliation: University of Sheffield, UK. e.dabrowska@shef.ac.uk
authors.forename: Ewa
authors.initials: E
authors.lastname: Dabrowska
authors.forename: Marcin
authors.initials: M
authors.lastname: Szczerbiński
mesh_terms: D000328:Adult; D000367:Age Factors; D016022:Case-Control Studies; D002663:Child Language; D002675:Child, Preschool; D005260:Female; D006801:Humans; D008037:Linguistics; D008297:Male; D010700:Phonetics; D012044:Regression Analysis