Direct and indirect realism

In philosophy of perception and philosophy of mind, direct (or naïve) realism, as opposed to indirect (or representational) realism, are differing models that describe the nature of conscious experiences. The debate arises out of the metaphysical question of whether the world we see around us is the real world itself or merely an internal perceptual copy of that world generated by our conscious experience.

Indirect perceptual realism is broadly equivalent to the scientific view of perception that subjects do not experience the external world as it really is, but perceive it through the lens of a conceptual framework. Furthermore, indirect realism is a core tenet of the cognitivism paradigm in psychology and cognitive science. While there is superficial overlap, the indirect model is unlike the standpoint of idealism, which holds that only ideas are real, but there are no mind-independent objects.

Conversely, direct perceptual realism postulates that conscious subjects view the world directly, treating concepts as a 1:1 correspondence. Furthermore, the framework rejects the premise that knowledge arrives via a representational medium, as well as the notion that concepts are interpretations of sensory input derived from a real external world.

History

Aristotle was the first to provide a description of direct realism. In On the Soul he describes how a seer is informed of the object itself by way of the hylomorphic form carried over the intervening material continuum with which the eye is impressed. In medieval philosophy, direct realism was further defended by Thomas Aquinas.