Evidence map›Paper›PMID 33468671›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2021

Distinct electrophysiological signatures of task-unrelated and dynamic thoughts.

Julia W Y Kam, Zachary C Irving, Caitlin Mills, Shawn Patel, Alison Gopnik, Robert T Knight

Open access · greenAbstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 26 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
26citing papers in PubMed, 2 pooled it
5.7field-weighted citation impact, top 3% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

26 citing papers in PubMed, 2 syntheses or guidelines pooled it, 68 citations in OpenAlex.

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  8. Neural Sensitivity to the Heartbeat Is Modulated by Fluctuations in Affective Arousal during Spontaneous Thought.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2025
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors at 4 institutions in 2 countries.

Julia W Y KamDepartment of Psychology, University of Calgary, Calgary, AB T2N 1N4, Canada; julia.kam@ucalgary.ca.ORCID https://orcid.org/0000-0002-2369-2148
Zachary C IrvingCorcoran Department of Philosophy, University of Virginia, Charlottesville, VA 22904.ORCID https://orcid.org/0000-0002-6621-5202
Caitlin MillsDepartment of Psychology, University of New Hampshire, Durham, NH 03824.
Shawn PatelHelen Wills Neuroscience Institute, University of California, Berkeley, CA 94720.ORCID https://orcid.org/0000-0003-0709-6183
Alison GopnikDepartment of Psychology, University of California, Berkeley, CA 94704.ORCID https://orcid.org/0000-0002-7183-0867
Robert T KnightHelen Wills Neuroscience Institute, University of California, Berkeley, CA 94720.ORCID https://orcid.org/0000-0001-8686-1685
University of California, Berkeley · USUniversity of Calgary · CAUniversity of New Hampshire · USUniversity of Virginia · US

Funding

Attention, Orientation and the Human Prefrontal CortexR01NS021135 · NINDS · UNIVERSITY OF CALIFORNIA DAVIS · PI Robert Thomas Knight · 1985 to 2026
$6.5M
ATTENTION, ORIENTATION, & THE HUMAN PREFRONTAL CORTEXR37NS021135 · NINDS · UNIVERSITY OF CALIFORNIA BERKELEY · PI KNIGHT, ROBERT THOMAS · 2013 to 2019
$3.6M
ATTENTION, ORIENTATION, & PREFRONTAL CORTEXR56NS021135 · NINDS · UNIVERSITY OF CALIFORNIA BERKELEY · PI KNIGHT, ROBERT THOMAS · 2012 to 2012
$462k
NINDS NIH HHS R01 NS021135NINDS NIH HHS R37 NS021135NINDS NIH HHS R56 NS021135
6 · The paper itself

Abstract

Humans spend much of their lives engaging with their internal train of thoughts. Traditionally, research focused on whether or not these thoughts are related to ongoing tasks, and has identified reliable and distinct behavioral and neural correlates of task-unrelated and task-related thought. A recent theoretical framework highlighted a different aspect of thinking-how it dynamically moves between topics. However, the neural correlates of such thought dynamics are unknown. The current study aimed to determine the electrophysiological signatures of these dynamics by recording electroencephalogram (EEG) while participants performed an attention task and periodically answered thought-sampling questions about whether their thoughts were 1) task-unrelated, 2) freely moving, 3) deliberately constrained, and 4) automatically constrained. We examined three EEG measures across different time windows as a function of each thought type: stimulus-evoked P3 event-related potentials and non-stimulus-evoked alpha power and variability. Parietal P3 was larger for task-related relative to task-unrelated thoughts, whereas frontal P3 was increased for deliberately constrained compared with unconstrained thoughts. Frontal electrodes showed enhanced alpha power for freely moving thoughts relative to non-freely moving thoughts. Alpha-power variability was increased for task-unrelated, freely moving, and unconstrained thoughts. Our findings indicate distinct electrophysiological patterns associated with task-unrelated and dynamic thoughts, suggesting these neural measures capture the heterogeneity of our ongoing thoughts.

Indexed as

AttentionBrainElectroencephalographyEvent-Related Potentials, P300Evoked PotentialsHumansconstrained thoughtsEEGfreely moving thoughtsmind wanderingtask-unrelated thoughts

Identifiers

PMID33468671
PMCPMC7848609
OpenAlexW3121623118

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.