Perception of the difference between past and present stimulus: A rare orientation illusion may indicate incidental access to prediction error-like signals.

ABSTRACT: A popular model for sensory processing, known as predictive coding, proposes that incoming signals are iteratively compared with top-down predictions along a hierarchical processing scheme. At each step, error signals arising from differences between actual input and prediction are forwarded and recurrently minimized by updating internal models to finally be "explained away". However, the neuronal mechanisms underlying such computations and their limitations in processing speed are largely unknown. Further, it remains unclear at which step of cortical processing prediction errors are explained away, if at all. In the present study, human subjects briefly viewed the superposition of two orthogonally oriented gratings followed by abrupt removal of one orientation after either 33 or 200 milli

SUBMITTER: Staadt R 

PROVIDER: S-EPMC7197803 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature