who provided the original taxonomy for the cognitive domain
Bloom's taxonomy The models were named after Benjamin Bloom, who chaired the committee of educators that devised the taxonomy. He also edited the first volume of the standard text, Taxonomy of Educational Objectives: The Classification of Educational Goals.[1][2]
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]