FORMAL OPERATIONS By Nugent, Pam M.S. - May 11, 2013 Jean Piaget's theory of cognitive development. These are the fully developed intellectual functions of abstract thinking, logical processes, judgement and conceptualisation. FORMAL OPERATIONS: "Formal operations develop in Piaget's 4th stage." Related Psychology Terms SENSORIMOTOR STAGE ANIMISTIC THINKING TERTIARY CIRCULAR DECALAGE SENSORIMOTOR INTELLIGENCE PREDICATE THINKING INTUITIVE STAGE NEGATION DECENTRATION STATES VERSUS TRANSFORMATIONS Cite this page: Nugent, Pam M.S., "FORMAL OPERATIONS," in PsychologyDictionary.org, May 11, 2013, https://psychologydictionary.org/formal-operations/ (accessed June 28, 2017).