“…A rich literature has established that IC processes improve rapidly in the preschool and early school‐aged years (e.g., Bunge, Dudukovic, Thomason, Vaidya, & Gabrieli, ; Carver, Livesey, & Charles, ; Casey, Trainor, Orendi, et al, ; Davidson, Amso, Anderson, & Diamond, ; Diamond, ; Durston et al, ; Gerstadt, Hong, & Diamond, ; Jones, Rothbart, & Posner, ) and that this depends heavily on coincident brain development occurring in the frontal cortex (e.g., Casey, Castellanos et al, Casey, Castellanos, Giedd, et al, ; Casey, Trainor, Orendi et al, Casey, Trainor, Orendi, et al, ; Diamond, ; Durston et al, ). Recent work has provided evidence that the child's social environment, and particularly close relationships like that of the mother–child relationship, may also have an important influence on the development of neurocognitive functions like IC and other dimensions of EF in early childhood (e.g., Bernier, Beauchamp, Carlson, & Lalonde, ; Bernier et al, ; Matte‐Gagné, Bernier, & Lalonde, ; Rhoades, Greenberg, Lanza, & Blair, ; Valcan, Davis, & Pino‐Pasternak, ). One possibility is that maternal behavior may have a direct influence on neural mechanisms that support the development of IC in early childhood, and that this results in individual differences in behavior.…”