Both the timing (i.e., ‘when’) and amount (i.e., ‘how much’) of language exposure have been shown to affect language-learning outcomes. Monolinguals and (most) bilinguals confound these two factors of early exposure and extended exposure (i.e., their first-acquired language is their most used or dominant language), making it difficult to isolate...
Infants’ initially broad links between language and object categories are increasingly tuned, becoming more precise by the end of their first year. In a longitudinal study, we asked whether individual differences in the precision of infants’ links at 12 months of age are related to vocabulary development. We found that,...