| Title: |
Pre-stimulus beta power mediates explicit and implicit perceptual biases in distinct cortical areas |
| Authors: |
Forster, C.; Stephani, T.; Grund, M.; Panagoulas, E.; Al, E.; Hofmann, S.; Nikulin, V.; Villringer, A. |
| Source: |
Communications Psychology |
| Publication Year: |
2025 |
| Collection: |
Max Planck Society: MPG.PuRe |
| Description: |
Perception is biased by expectations and previous actions. Pre-stimulus brain oscillations are a potential candidate for implementing biases in the brain. In two EEG studies (43 and 39 participants) on somatosensory near-threshold detection, we investigated the pre-stimulus neural correlates of an (implicit) previous choice bias and an explicit bias. The explicit bias was introduced by informing participants about stimulus probability on a single-trial level (volatile context) or block-wise (stable context). Behavioural analysis confirmed adjustments in the decision criterion and confidence ratings according to the cued probabilities and previous choice-induced biases. Pre-stimulus beta power with distinct sources in sensory and higher-order cortical areas predicted explicit and implicit biases, respectively, on a single subject level and partially mediated the impact of previous choice and stimulus probability on the detection response. We suggest pre-stimulus beta oscillations in distinct brain areas as a neural correlate of explicit and implicit biases in somatosensory perception. |
| Document Type: |
article in journal/newspaper |
| File Description: |
application/pdf |
| Language: |
English |
| Relation: |
info:eu-repo/semantics/altIdentifier/pmid/40544197 |
| Availability: |
https://hdl.handle.net/21.11116/0000-000F-6D89-D; https://hdl.handle.net/21.11116/0000-0011-68D6-7; https://hdl.handle.net/21.11116/0000-0011-68D7-6; https://hdl.handle.net/21.11116/0000-0011-68D8-5 |
| Rights: |
info:eu-repo/semantics/openAccess ; https://creativecommons.org/licenses/by/4.0/ |
| Accession Number: |
edsbas.F72F8811 |
| Database: |
BASE |