This document discusses psychosocial development in infancy. It covers emotional development from 6 weeks to 18 months, including emotions like happiness, fear, anger and pride. Temperament is described as inborn differences in emotions and self-regulation. Infant attachment patterns include secure, avoidant, resistant and disorganized attachments. Theories of development discussed include psychoanalysis, behaviorism and cognitive approaches. Early relationships help form working models that guide later assumptions.