<qa>  What is the primary hypothesis that home-based peer support will improve maternal-infant interactionsThis controlled study will help establish the link between support for maternal caregiving, maternal-infant interaction, infant neuroendocrinology and infant cognitive and social development. The primary hypothesis predicts that home-based peer support will improve maternal-infant interactions. Secondary hypotheses predict that home-based peer support will: improve infants cognitive development; improve infants social development; decrease average daily salivary cortisol levels in infants; reduce maternal depressive symptomatology; and improve maternal perceptions of social support. 