what are the four stages of cognitive development proposed by piaget
Piaget's theory of cognitive development In his theory of Cognitive development, Jean Piaget proposed that humans progress through four developmental stages: the sensorimotor, preoperational, concrete operational and formal operational period.[20] The first of these, the sensorimotor stage "extends from birth to the acquisition of language."[21] In this stage, infants progressively construct knowledge and understanding of the world by coordinating experiences (such as vision and hearing) with physical interactions with objects (such as grasping, sucking, and stepping).[22] Infants gain knowledge of the world from the physical actions they perform within it.[23] They progress from reflexive, instinctual action at birth to the beginning of symbolic thought toward the end of the stage.[23]
Educational psychology Johann Herbart (1776–1841) is considered the father of educational psychology.[13] He believed that learning was influenced by interest in the subject and the teacher.[13] He thought that teachers should consider the students' existing mental sets—what they already know—when presenting new information or material.[13] Herbart came up with what are now known as the formal steps. The 5 steps that teachers should use are: