LAUSR

This study investigates infants' enculturation to music in a bicultural musical environment. We tested 49 12- to 30-month-old Korean infants on their preference for Korean or Western traditional songs played by haegeum and cello. Korean infants have access to both Korean and Western music in their environment as captured on a survey of infants' daily exposure to music at home. Our results show that infants with less daily exposure to any kind of music at home listened longer to all music types. The infants' overall listening time did not differ between Korean and Western music and instruments. Rather, those with high exposure to Western music listened longer to Korean music played with haegeum. Moreover, older toddlers (aged 24-30 months) maintained a longer interest in songs of an origin with which they are less familiar, indicating an emerging orientation towards novelty. Early orientation of Korean infants toward the novel experience of music listening is likely driven by perceptual curiosity, which drives exploratory behavior that diminishes with continued exposure. On the other hand, older infants' orientation towards novel stimuli is led by epistemic curiosity, which motivates an infant to acquire new knowledge. Korean infants' lack of differential listening likely reflects their protracted period of enculturation to ambient music due to complex input. Further, older infants' novelty-orientation is consistent with findings in bilingual infants' orientation towards novel information. Additional analysis showed a long-term effect of music exposure on infants' vocabulary development. A video abstract of this article can be viewed at https://www.youtube.com/watch?v=Kllt0KA1tJk RESEARCH HIGHLIGHTS: Korean infants showed novelty-oriented attention to music such that infants with less daily exposure to music at home showed longer listening times to music. 12- to 30-month-old Korean infants did not show differential listening to Korean versus Western music or instruments, suggesting a protracted period of perceptual openness. 24- to 30-month-old Korean toddlers' listening behavior indicated emerging novelty-preference, exhibiting delayed enculturation to ambient music compared to Western infants reported in earlier research. 18-month-old Korean infants with a greater weekly exposure to music had higher CDI scores a year later, consistent with the well-known music-to-language transfer effect.