Event-related potentials reflect prediction errors and pop-out during comprehension of degraded speech.

ABSTRACT: Comprehension of degraded speech requires higher-order expectations informed by prior knowledge. Accurate top-down expectations of incoming degraded speech cause a subjective semantic 'pop-out' or conscious breakthrough experience. Indeed, the same stimulus can be perceived as meaningless when no expectations are made in advance. We investigated the event-related potential (ERP) correlates of these top-down expectations, their error signals and the subjective pop-out experience in healthy participants. We manipulated expectations in a word-pair priming degraded (noise-vocoded) speech task and investigated the role of top-down expectation with a between-groups attention manipulation. Consistent with the role of expectations in comprehension, repetition priming significantly enhanced percept

SUBMITTER: Banellis L 

PROVIDER: S-EPMC7585676 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature