First of the four stages in Piaget’s model of cognitive development. In this stage, infants are learning the relationship between their bodies in relation to their surroundings. Learned through trial-and-error. Piaget’s theory of cognitive development is a comprehensive theory about the nature and development of human intelligence. It was originated by the Swiss developmental psychologist Jean Piaget. The theory deals with the nature of knowledge itself and how humans gradually come to acquire, construct, and use it
