Horizontal and vertical décalage are terms coined by renowned developmental psychologist Jean Piaget, who is credited for the four Stages of Cognitive Development: sensorimotor, preoperational, concrete operations, and formal operations.
Horizontal are terms. Vertical décalage are terms. These terms are coined by renowned developmental psychologist Jean Piaget. These terms are coined by sensorimotor. These terms are coined by formal operations. Sensorimotor is preoperational, concrete operations. Renowned developmental psychologist Jean Piaget is credited for the four Stages of Cognitive Development.