Rule-based and stimulus-based cues bias auditory decisions via different computational and physiological mechanisms.

ABSTRACT: Expectations, such as those arising from either learned rules or recent stimulus regularities, can bias subsequent auditory perception in diverse ways. However, it is not well understood if and how these diverse effects depend on the source of the expectations. Further, it is unknown whether different sources of bias use the same or different computational and physiological mechanisms. We examined how rule-based and stimulus-based expectations influenced behavior and pupil-linked arousal, a marker of certain forms of expectation-based processing, of human subjects performing an auditory frequency-discrimination task. Rule-based cues consistently biased choices and response times (RTs) toward the more-probable stimulus. In contrast, stimulus-based cues had a complex combination of effects,

SUBMITTER: Tardiff N 

PROVIDER: S-EPMC9581427 | biostudies-literature | 2022 Oct

REPOSITORIES: biostudies-literature