the theory that the neuropsychological development of a child occurs along two parallel and complementary pathways, each of which acts in parallel and constantly affects the other. None of the paths can be understood in isolation. These pathways include neurobiological development, which is related to the organic and functional growth of the brain and nervous system, as well as psychological, cognitive, and social development, which reflects the child’s acquisition of cognitive, emotional, behavioral, and interactive skills. This parallelism means that every cognitive or emotional function does not evolve independently of the neural structures that support it. At the same time, psychological, social, and educational experiences affect the organization of neural structures and contribute to improving or changing developmental trajectories. From this perspective, understanding child development becomes a complex process linking biological, neurological, psychological, and social factors, recognizing that any disruption or delay in one pathway can affect the other. This requires comprehensive therapeutic and educational interventions that take into account this relationship to ensure balanced and comprehensive child development at all levels.