Work

Local motion pooling is continuous, global motion perception is discrete.

Year: 2022

Type: article

Abstract: Perceiving the motion of an object is thought to involve two stages: Local motion energy is measured at each point in space, and these signals are then pooled across space to build coherent global motion. There are several theories of how local-to-global pooling occurs, but they all predict that global motion perception is a continuous process, such that increasing the strength of motion energy should gradually increase the precision of perceived motion directions. We test this prediction against the alternative that global motion perception is discrete: Motion is either perceived with high precision or fails to be perceived altogether. Data from human observers provides clear evidence that, whereas pooling local motion energy is continuous, the segmentation of local signals into coherent global motion patterns is a discrete process. This result adds motion perception to the growing list of processes that exhibit evidence of all-or-none visual awareness. (PsycInfo Database Record (c) 2022 APA, all rights reserved).

Source: Journal of Experimental Psychology Human Perception & Performance

DOI: 10.1037/xhp0000971

Authors: Marshall L. Green, Michael S. Pratte

Institution: Mississippi State University

Language: English

Topic: Visual perception and processing mechanisms

Subfield: Cognitive Neuroscience

Field: Neuroscience

Domain: Life Sciences

Open Access status: hybrid

Funders: National Institutes of Health, National Institute of Mental Health

Award: Temporal Dynamics and Selection Mechanisms of Visual Memory Consolidation