the school of psychology that emphasized the organization of perceptual
Gestalt psychology Gestalt psychology or gestaltism (German: Gestalt [ɡəˈʃtalt] "shape, form") is a philosophy of mind of the Berlin School of experimental psychology. Gestalt psychology is an attempt to understand the laws behind the ability to acquire and maintain meaningful perceptions in an apparently chaotic world. The central principle of gestalt psychology is that the mind forms a global whole with self-organizing tendencies. The assumed physiological mechanisms on which Gestalt theory rests are poorly defined and support for their existence is lacking.[1][2] The Gestalt theory of perception has been criticized as being descriptive of the end products of perception without providing much insight into the processes that lead to perception.[2] In the introduction to a 2016 special issue of the journal Vision Research on Gestalt perception, the authors concluded that "even though they study the same phenomena as earlier Gestaltists, there is little theoretical coherence. What happened to the Gestalt school that always aspired to provide a unified vision of psychology? Perhaps there is, in fact, little that holds the classic phenomena of Gestalt psychology together."[3]
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]