In Jean Piaget’s theory regarding cognitive development, the primary circular reaction occurs approximately between six weeks and four months of age. The infant begins to make primitive connections between goals and actions to achieve them. Primary circular reaction first occurs in the sensorimotor stage, and is subsequent to the development of the infant’s reflexive actions like crying and squirming.
PRIMARY CIRCULAR REACTION: “The baby first began to suck on her fist to try and alleviate hunger; an indication of primary circular reaction.”