The reflex arc concept in psychology, as proposed by Professor John Dewey, is a central idea that attempts to unify psychological processes. However, Dewey argues that this concept is flawed because it treats sensory stimulus and motor response as separate entities, when in reality, they are parts of a continuous sensori-motor coordination. The reflex arc is not a simple sequence of events but a complex, ongoing process where sensation, idea, and movement are interrelated functions within a single, unified whole. Dewey criticizes the traditional dualism between sensation and idea, and between stimulus and response, which he believes persists in the reflex arc concept. He argues that the reflex arc is not a circuit but a patchwork of disjointed parts, and that the true nature of psychological processes is a continuous coordination, not a sequence of isolated events. He also points out that the reflex arc concept fails to account for the dynamic and functional relationship between sensation and movement, and that the distinction between stimulus and response is not a matter of existence but of function. Dewey concludes that the reflex arc concept is inadequate because it does not fully capture the unified, continuous nature of psychological processes, and that a more accurate understanding of psychology must recognize the interdependence of sensation, idea, and movement within a single, ongoing coordination.The reflex arc concept in psychology, as proposed by Professor John Dewey, is a central idea that attempts to unify psychological processes. However, Dewey argues that this concept is flawed because it treats sensory stimulus and motor response as separate entities, when in reality, they are parts of a continuous sensori-motor coordination. The reflex arc is not a simple sequence of events but a complex, ongoing process where sensation, idea, and movement are interrelated functions within a single, unified whole. Dewey criticizes the traditional dualism between sensation and idea, and between stimulus and response, which he believes persists in the reflex arc concept. He argues that the reflex arc is not a circuit but a patchwork of disjointed parts, and that the true nature of psychological processes is a continuous coordination, not a sequence of isolated events. He also points out that the reflex arc concept fails to account for the dynamic and functional relationship between sensation and movement, and that the distinction between stimulus and response is not a matter of existence but of function. Dewey concludes that the reflex arc concept is inadequate because it does not fully capture the unified, continuous nature of psychological processes, and that a more accurate understanding of psychology must recognize the interdependence of sensation, idea, and movement within a single, ongoing coordination.