Figure 4.
Average difference between standard and target peak activations for bilingual and monolingual babies by age in the left IFC and left STG for the Native and Non-Native language conditions. Note that the bilingual and monolingual babies show different patterns of activation in the left IFC. The bilingual babies had more similar activity levels for the Native and Non-Native phonetic contrasts than the monolingual babies, who showed greater left IFC activations to their native language and corresponds to behavioral data showing that older bilingual babies’ phonetic discrimination capacities remain “open” at the time when older monolingual babies’ phonetic discrimination capacities “close” to only their native language phonetic contrasts.