Beta power encodes contextual estimates of temporal event probability in the human brain

  • To prepare for an impending event of unknown temporal distribution, humans internally increase the perceived probability of event onset as time elapses. This effect is termed the hazard rate of events. We tested how the neural encoding of hazard rate changes by providing human participants with prior information on temporal event probability. We recorded behavioral and electroencephalographic (EEG) data while participants listened to continuously repeating five-tone sequences, composed of four standard tones followed by a non-target deviant tone, delivered at slow (1.6 Hz) or fast (4 Hz) rates. The task was to detect a rare target tone, which equiprobably appeared at either position two, three or four of the repeating sequence. In this design, potential target position acts as a proxy for elapsed time. For participants uninformed about the target’s distribution, elapsed time to uncertain target onset increased response speed, displaying a significant hazard rate effect at both slow and fast stimulus rates. However, only in fast sequences did prior information about the target’s temporal distribution interact with elapsed time, suppressing the hazard rate. Importantly, in the fast, uninformed condition pre-stimulus power synchronization in the beta band (Beta 1, 15–19 Hz) predicted the hazard rate of response times. Prior information suppressed pre-stimulus power synchronization in the same band, while still significantly predicting response times. We conclude that Beta 1 power does not simply encode the hazard rate, but—more generally—internal estimates of temporal event probability based upon contextual information.
Metadaten
Author:Alessandro Tavano, Erich Schröger, Sonja A. Kotz
URN:urn:nbn:de:hebis:30:3-512651
DOI:https://doi.org/10.1371/journal.pone.0222420
ISSN:1932-6203
Pubmed Id:https://pubmed.ncbi.nlm.nih.gov/31557168
Parent Title (English):PLoS one
Publisher:PLoS
Place of publication:Lawrence, Kan.
Contributor(s):Manuel S. Malmierca
Document Type:Article
Language:English
Year of Completion:2019
Date of first Publication:2019/09/26
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2019/09/30
Tag:Attention; Behavior; Electrode potentials; Electroencephalography; Permutation; Probability density; Probability distribution; Scalp
Volume:14
Issue:(9): e0222420
Page Number:19
First Page:1
Last Page:19
Note:
Copyright: © 2019 Tavano et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
HeBIS-PPN:454157312
Institutes:Psychologie und Sportwissenschaften / Psychologie
Angeschlossene und kooperierende Institutionen / MPI für empirische Ästhetik
Dewey Decimal Classification:1 Philosophie und Psychologie / 15 Psychologie / 150 Psychologie
Sammlungen:Universitätspublikationen
Licence (German):License LogoCreative Commons - Namensnennung 4.0