Expectations do not alter early sensory processing during perceptual decision-making

บทความในวารสาร

ผู้เขียน/บรรณาธิการ

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รายละเอียดสำหรับงานพิมพ์

รายชื่อผู้แต่ง: Rungratsameetaweemana N., Itthipuripat S., Salazar A., Serences J.T.

ผู้เผยแพร่: Society for Neuroscience

ปีที่เผยแพร่ (ค.ศ.): 2018

วารสาร: The Journal of Neuroscience (0270-6474)

Volume number: 38

Issue number: 24

หน้าแรก: 5632

หน้าสุดท้าย: 5648

จำนวนหน้า: 17

นอก: 0270-6474

eISSN: 1529-2401

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85050884373&doi=10.1523%2fJNEUROSCI.3638-17.2018&partnerID=40&md5=4a02f0a39a8236bf6683c739551f4869

ภาษา: English-Great Britain (EN-GB)

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บทคัดย่อ

Two factors play important roles in shaping perception: the allocation of selective attention to behaviorally relevant sensory features, and prior expectations about regularities in the environment. Signal detection theory proposes distinct roles of attention and expectation on decision-making such that attention modulates early sensory processing, whereas expectation influences the selection and execution of motor responses. Challenging this classic framework, recent studies suggest that expectations about sensory regularities enhance the encoding and accumulation of sensory evidence during decision-making. However, it is possible, that these findings reflect well documented attentional modulations in visual cortex. Here, we tested this framework in a group of male and female human participants by examining how expectations about stimulus features (orientation and color) and expectations about motor responses impacted electro-encephalography(EEG) markers of early sensory processing and the accumulation of sensoryevidenceduringdecision-making(theearly visual negative potential and the centro-parietal positive potential, respectively). We first demonstrate that these markers are sensitive to changes in the amount of sensory evidence in the display. Then we show, counter to recent findings, that neither marker is modulated by either feature or motor expectations, despite a robust effect of expectations on behavior. Instead, violating expectations about likely sensory features and motor responses impacts posterior alpha and frontal theta oscillations, signals thought to index overall processing time and cognitive conflict. These findings are inconsistent with recent theoretical accounts and suggest instead that expectations primarily influence decisions by modulating post-perceptual stages of information processing. ฉ 2018 the authors.

คำสำคัญ

Cognitive control, Expectation, Sensory modulation