Resting-state intrinsic network connectivity and mind wandering: Insights from tasks with varying demands.
Level 4 - case-series / case-control
Cross-sectional observational study (graded by design analogy)
PubMed 40354263 · doi:10.1037/neu0001017
What was done
Researchers evaluated the relationship between resting-state functional connectivity and mind wandering across differing cognitive task loads in 93 participants. Participants underwent resting-state functional magnetic resonance imaging (rs-fMRI) and completed 0-back (low load) and 1-back (higher load) tasks outside the scanner to measure mind wandering. The study examined functional connectivity within and between intrinsic brain networks (default mode network [DMN], frontoparietal control network [FPCN], and dorsal attention network).
What was found
The abstract reports no numerical values, effect sizes, or test statistics. Directionally, the authors observed: - A significant positive correlation between mind wandering and resting-state within-network connectivity of the DMN during both 0-back and 1-back tasks. - In the 0-back task, mind wandering positively correlated with resting-state connectivity between the DMN and FPCN. - In the 1-back task, mind wandering positively correlated with resting-state connectivity between the DMN and the dorsal attention network.
Why it matters
The findings support the context regulation hypothesis, suggesting that functional interactions among intrinsic brain networks during mind wandering adaptively shift depending on environmental cognitive demands.
Limits
No exact correlation coefficients, p-values, or confidence intervals are reported in the abstract. Mind wandering was measured outside the scanner rather than concurrently during fMRI acquisition. The cross-sectional design cannot establish causality, and demographic or clinical characteristics of the sample were not specified.
Cited by
- supports The default mode network of the brain is activated during quiet rest, mind-wandering, and internally directed reflection rather than active external sensory or task processing.