Expectancy effects in feedback processing are explained primarily by time-frequency delta not theta.

Journal Article (Journal Article)

The roles of outcome valence and expectancy in feedback processing have been investigated as important factors modulating event-related potential (ERP) measures including the feedback negativity (FN) and P300, but results have been inconsistent. Recent work from our group has shown that processes underlying the FN and P300 are better represented as separable processes in the theta (3-7Hz) and delta (0-3Hz) ranges using time-frequency analysis. The current study evaluated the modulation of time-domain FN and P300 and time-frequency theta and delta to outcome valence and expectancy in a gambling feedback task paradigm. Results revealed that the FN was sensitive to valence but not expectancy, and that valence effects were driven by loss-sensitive theta and gain-sensitive delta. Alternatively, the P300 was sensitive to the expectedness of outcomes but only for gain trials, and these expectancy differences were explained by time-frequency delta not theta. These results add to a growing body of research showing that time-frequency measures reflect separable processes underlying time-domain components, where theta is more sensitive to primary task features and less sensitive to secondary features while delta is sensitive to primary and more complex, secondary task features.

Full Text

Duke Authors

Cited Authors

  • Watts, ATM; Bachman, MD; Bernat, EM

Published Date

  • October 2017

Published In

Volume / Issue

  • 129 /

Start / End Page

  • 242 - 252

PubMed ID

  • 28865935

Pubmed Central ID

  • PMC6157594

Electronic International Standard Serial Number (EISSN)

  • 1873-6246

International Standard Serial Number (ISSN)

  • 0301-0511

Digital Object Identifier (DOI)

  • 10.1016/j.biopsycho.2017.08.054


  • eng