Perceptualis

Perceptualis is a term used in discussions of perception in philosophy of mind and cognitive science to denote the perceptual aspect or content that arises directly from sensory input, as distinct from higher-order cognitive processing such as beliefs, interpretations, or expectations. The term is not widely standardized and its precise definition varies across authors.

Etymology: from Latin perceptualis “of perceiving,” from perceptus “perceived,” with the suffix -alis forming an adjective.

Usage and scope: Perceptualis is often employed to refer to the immediate, experiential content of perception—the “what it is like” aspect—before linguistic labeling or inferential processing. In this sense perceptualis may overlap with or be contrasted against conceptual content or cognitive content.

Theoretical contexts: In debates on direct realism versus representationalism, perceptualis is used to discuss the raw perceptual data that subjects seem to experience prior to belief formation. In predictive coding or Bayesian accounts, perceptualis content is the bottom-up signal that is updated by priors and predictions. The term is sometimes invoked to distinguish the experiential quality of perception from interpretive or evaluative processes that follow.

Criticism and variation: Some scholars argue the term is redundant because perceptual content is already studied under perception or phenomenal content. Others warn that it risks ambiguity due to overlap with existing terms such as perceptual content or phenomenology, and that its definitions can be inconsistent across a literature.

See also: Consciousness, Phenomenology, Perception, Qualia, Representationalism, Predictive processing.