A set of hypotheses derived from Belsky’s process model of the determinants of parenting was tested in a sample of 129 Dutch parents with their 15-month-old infants. Parental ego-resiliency and education, partner support, and infant social fearfulness were found to explain significant and unique portions of variance in the observed quality of parental behavior, which, in turn, was linked to the infants’ attachment security and cognitive development. Parental intelligence was both indirectly-through parenting-and directly related with infant Bayley Mental Developmental Index, whereas parental ego-resiliency was both indirectly and directly linked with infant Attachment Q-Set security. Belsky’s claim that parents’ personal resources are most effective and child characteristics are least effective in buffering the parenting system was not empirically confirmed.