DECALAGE By Nugent, Pam M.S. - April 7, 2013 Jean Piaget's theory of cognitive development about the invariant order that cognitive developments occur in. See horizontal or vertical decalage. DECALAGE: "Decalage is a French word meaning an interval or shift." Related Psychology Terms TERTIARY CIRCULAR SENSORIMOTOR INTELLIGENCE INTUITIVE STAGE FORMAL OPERATIONS NEGATION DECENTRATION STATES VERSUS TRANSFORMATIONS SECONDARY CIRCULAR REACTION SENSORIMOTOR STAGE PIAGET, JEAN Cite this page: Nugent, Pam M.S., "DECALAGE," in PsychologyDictionary.org, April 7, 2013, https://psychologydictionary.org/decalage/ (accessed June 28, 2017).