Jean Piaget

Swiss developmental psychologist and genetic epistemologist (1896–1980). For the wiki, Piaget matters as the contrast figure against whom Merleau-Ponty sets his own developmental phenomenology — and against whom Wallon is silently preferred. Piaget assumes the Sorbonne chair of child psychology after MP (1949–1952), and his concept of the objet permanent (constructed through representation, around 18 months) is the polemical target of MP's ultra-chose. In the late ontology, Piaget's réversibilité logique is the contrast for MP's réversibilité des dimensions (OE p. 65) — the cardinal late distinction that Saint Aubert reads as MP's answer to genetic epistemology.

Key Points

  • Wallon contra Piaget: MP follows Wallon on developmental phases and the affective-postural register; he refuses Piaget's intellectualist reduction of social and perceptual development to the construction of operational schemas.
  • The objet permanent as the target: Piaget's concept that the child constructs objectivity through representation — and that before this construction, "for the infant the object does not exist" — is exactly the developmental program MP rejects. For MP via Wallon, the ultra-chose is the perceptual residue of an inaccessible-real that representation never fully conquers.
  • The Sorbonne succession (1949–52): Piaget assumes the chair of child psychology after MP, giving the disagreement institutional shape. Saint Aubert tracks how MP's 1949–1952 Sorbonne lectures (*Primacy of Perception* Ch 4) silently work against the conception of the child his successor will install.
  • "Hypercartésien" Piaget: Saint Aubert's diagnostic — Piaget joins Sartre and Descartes in the trio of hypercartésiens whose shared "ontologie de la conscience" sees the perceptual residue of the ultra-chose as a defect to be overcome rather than as the positive ontological mode it actually is.
  • Réversibilité logique vs. dimensionnelle: Late MP (EM3 [245]v(28), OE p. 65) explicitly contrasts Piaget's réversibilité logique — the operational reversibility of formal thought — with his own réversibilité des dimensions, the perceptual reversibility of horizon, depth, and "all modes of space." See reversibility for the full distinction.
  • Pregnancy escapes Piaget's dilemma: As pregnancy-pragnanz records, MP argues Prägnanz escapes the Piagetian alternatives (field effects vs. sensori-motor activity) because it "implies motivity a fortiori."

Role in the Wiki

Piaget is the recurrent anti-pole against whom MP's developmental and late-ontological commitments take their sharpest form. His name recurs across:

  • ultra-chose — the cardinal MP-vs-Piaget contrast on perceptual development.
  • reversibility — Piaget's logical reversibility distinguished from MP's dimensional reversibility.
  • pregnancy-pragnanz — Piaget's dilemma escaped via the Prägnanz motif.
  • metaphoricity — MP's réversibilité des dimensions as the late-ontology answer to Piaget's réversibilité logique.

Connections

  • contrast figure for henri-wallon — MP follows Wallon and refuses Piaget on the same developmental terrain.
  • target of ultra-chose — MP's polemic against the "objet permanent" of genetic epistemology.
  • target of reversibility — MP's réversibilité des dimensions posed against Piaget's réversibilité logique.
  • grouped with Descartes and jean-paul-sartre as "hypercartésiens" in Saint Aubert's diagnostic of the late MP's "ontologie de l'objet" critique.
  • succeeded MP at the Sorbonne chair of child psychology (1952), giving the disagreement institutional shape.

The Welsh/Verdier Sorbonne anchor: closet logicism

The Welsh/Verdier edition of MP's Sorbonne lectures supplies a sharper diagnostic of Piaget than the wiki has previously recorded. The cardinal formulation is at chapter 4 §II.D (p. 221): "from the moment when Piaget admits that there exists for thought a state of final equilibrium where all mental operations are grouped, he restores a certain logicism." The diagnostic: Piaget's anti-logicist self-presentation is betrayed by his framework. Once he postulates an absolute final equilibrium toward which thought converges, the framework smuggles back the very logicism Piaget disclaims.

The cardinal consequence (CPP ch. 4 §II.D, p. 222): "Intelligence's definition, according to Piaget, is that of a decentered, nonsituated, total thought like that of God in classical philosophy." Piaget's adult intelligence becomes quasi-divine, nonsituated thought. This produces a real discontinuity between perceptual genesis and the final equilibrium; Piaget devalorizes preintellectual forms because they are causally explicable, while the final equilibrium must be necessary. "In philosophy, to not take part in philosophy is also philosophy" (p. 222) — Piaget's claimed logical neutrality is itself a philosophy, an "inattentive" one.

The diagnostic closet logicism is sharper than the more common charge that Piaget intellectualizes the child. Where the latter is a practice charge, the closet-logicism diagnostic names the philosophical position hidden in Piaget's framework. The Sorbonne lectures also extend the critique:

  • Mobile equilibrium vs. permanent equilibrium: Piaget's "permanent equilibrium" of thought is incompatible with thought-as-Gestaltung. "All equilibrium of thought contains in itself an evolutionary seed. To be absolutely independent of one's thought would cause the subject to be immobilized" (CPP ch. 4 §II.D, p. 223).
  • "Magical thinking" as translation artifact: Piaget's "animism" diagnosis is largely an artifact of his adultomorphic translation of child responses (see adultomorphism). When Huang's contrastive method tests children with concrete situations rather than verbal interrogation, magical-thinking responses are rare — 3 out of 36 and only "as a last resort" (CPP ch. 3 §VIII.B, p. 205). See infantile-polymorphism.
  • Decentration as relative, not absolute: both Piaget and gestalt agree decentration is required for intelligence; Piaget treats it as absolute, gestalt treats it as relative — only a structure for a new situated thought (CPP ch. 4 §IV).
  • The associationist-physics schema in perception: Piaget's "actual centerings + virtual centerings + accumulating memories" is "an associationist's schema" reading classical-physics composition-of-forces back into perception (CPP ch. 3 §IV.A.2, p. 173).

The Sorbonne-period Piaget critique is the philosophical-methodological precursor to the ultra-chose / reversibility / *Primacy of Perception* critique Saint Aubert tracks in the late ontology. The development is doctrinal continuity with increased precision: by 1949–52 MP had already named what Piaget's framework conceals.

Sources

  • saintaubert-2021-etre-et-chair-ii — Ch III § 3 (ultra-chose); Ch VII § 2b (réversibilité des dimensions vs. logique). Saint Aubert systematically tracks the Piaget-MP contrast across the developmental and late-ontological registers.
  • merleau-ponty-1964-primacy-of-perception — Ch 4 (1950–51 Sorbonne lectures), where MP's preference for Wallon over Piaget is enacted rather than declared.
  • merleau-ponty-2010-child-psychology-pedagogy — Welsh/Verdier edition of the 1949-52 Sorbonne lectures. The cardinal closet logicism diagnosis is at ch. 4 §II.D (p. 221); the associationist-physics schema critique at ch. 3 §IV.A.2 (p. 173); the "magical thinking" as translation artifact at ch. 3 §VIII; the "nonsituated thought like that of God in classical philosophy" at ch. 4 §II.D (p. 222). MP's most extensive Sorbonne-period critique.
  • Primary Piaget references (via the wiki's MP sources): La construction du réel chez l'enfant (1937), La psychologie de l'intelligence (1947), La représentation du monde chez l'enfant (1926).