James J. Gibson

American psychologist (1904–1979), founder of ecological psychology. His The Ecological Approach to Visual Perception (1986; first edition 1979) develops the theory of perception as direct pickup of structural information from the optic array, against representationalist and computational accounts. Gibson coined affordance — the action-relevant invariants of objects in an organism's ecological niche — and supplied systematic analyses of texture gradient, invariants, and the flow field that structure visual perception during locomotion.

In Taddio 2025 Gibson supplies three load-bearing elements:

  • The ecological theory of the world: "the world as encompassing all that we can experience" (Gibson 1986: 15, cited Taddio §1) — physical reality at scales beyond direct experience is accessible only through scientific mathematization.
  • The monocular depth cues: perspective, occlusion, texture gradient, elevation relative to horizon, relative size, shading — the conditions under which spatial depth is perceived in natural scenes and can be generated in pictorial images (Taddio §7).
  • The affordance concept — used by Taddio as cognate of "expressivity" in §§ 5 and 8 (a thing's affordances are its phenomenal invariants of action-possibility).

Gibson's Significance for Taddio

Three contributions make Gibson important to Taddio's argument:

  1. Anti-representationalism: Gibson's claim that perception is direct pickup of invariants from the optic array (without intermediate representations or inferences) parallels MP's claim that perception is irreducibly phenomenal — neither account treats perception as mediated by mental representations of distal objects.

  2. Texture gradient as system of equivalences: in Taddio §7, the texture gradient operates simultaneously in worldly perception (denser-textured regions appear farther) and in painting (Magritte's Golconde deploys the gradient via the men-in-bowler-hats density variation). The gradient is a phenomenal invariant in Taddio's sense — a structural condition shared between world and image. This is Gibson's clearest contribution to the *système d'équivalences* thesis.

  3. Ecological niche / form of life: Gibson's framing — "we directly perceive only the worldly dimension of reality, the environment understood as the horizon of all our experience" — supports Taddio's broader ecological-phenomenological framing in §1: there are as many worlds as there are forms of life, and our world is the experiential correlate of our embodied form.

Convergence with MP

Taddio explicitly aligns Gibson's ecological theory with MP's phenomenology:

  • Gibson's "world as ecological niche" parallels MP's Lebenswelt.
  • Gibson's invariants parallel MP's "structures."
  • Gibson's "affordance" parallels MP's notion of expressive solicitation.
  • Gibson's anti-representationalism parallels MP's anti-intellectualism in Phenomenology of Perception.

The convergence is not full identity — Gibson's account is naturalistic-evolutionary while MP's is phenomenological-ontological — but Taddio reads them as compatible at the level of descriptive findings about how the perceptual world is structured.

Connections

  • primary source for the monocular depth cues operating in pictorial depth (see depth-profondeur and systeme-d-equivalences).
  • primary source for the affordance concept used as cognate of expressivity in phenomenal-invariants.
  • paralleled by MP's phenomenology in Taddio's reading — same descriptive findings, different metaphysical framing.
  • paralleled by Lorenz's world-image apparatus — both ecological-evolutionary accounts of how the perceptual apparatus is shaped to its niche.
  • contrasts with representationalist and computational accounts of perception (Marr, etc.).

Sources

  • taddio-2025-art-and-psychology — Gibson cited at §§ 1, 5, 7, 8.
  • Indirect via Taddio: Gibson 1986 The Ecological Approach to Visual Perception (Lawrence Erlbaum). Not ingested as primary source.