Narrative abilities of bilingual children with and without Developmental Language Disorder (SLI): Differentiation and the role of age and input factors.

PURPOSE: The narrative abilities of bilinguals with TD and with DLD/SLI in their English L2 were examined in order to 1) identify the narrative components that differentiate these two groups and 2) determine the role of age and input factors in predicting L2 narrative abilities in each group.
METHOD: Participants were 24 English L2 children with DLD and 63 English L2 children with TD, matched on age (mean = 5; 8) and length of exposure to the L2 (mean = 24 months). Narrative samples were elicited using a story generation task and a parent questionnaire provided age and input variables.
RESULTS: Bilinguals with DLD had significantly lower scores for story grammar than their TD peers, but showed similar scores for narrative microstructure components. Length of L2 exposure in school and richness of the L2 environment predicted better narrative abilities for the group with TD but not with DLD. Older age predicted better narrative abilities for the group with DLD but not with TD. Quantity of L2 input/output at home did not predict story grammar or microstructure abilities in either group.
CONCLUSION: Story grammar might differentiate between children with TD and DLD better than microstructure among bilinguals with less exposure to the L2 and when a story generation task is used. Bilinguals with TD make more efficient use of L2 input than bilinguals with DLD.