Associations between white matter microstructure and infants' working memory

► Working memory emerges early in life and is critical for other cognitive functions. ► Infants' working memory is robustly associated with white matter microstructure. ► Tracts connecting brain regions known to support working memory were associated. ► Infants' age and general cognition were not as strongly associated with white matter. ► These results improve our understanding of brain-behavior relationships in infancy.