Common to all six childcare groups, maternal stimulation of
language at 18 and 36 months had some impact on child outcomes at
those ages but not to cognitive ability at 51 months. Mothers’ earlier
stimulation of their children’s language had only indirect links to their
later cognitive scores through earlier cognitive development.
Temperament at 18 months did not predict cognitive scores at 36
months in any groups. Furthermore, temperament at 36 months was
not associated with cognitive outcomes at 51 months.