Cited by 54Functional Brain Connectivity StudiesMental Health Research TopicsAdvanced MRI Techniques and Applications

An average sliding window correlation method for dynamic functional connectivity

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Vergara, Victor M., Abrol, Anees, Calhoun, Vince D.·2019·Human Brain Mapping

Abstract

Sliding window correlation (SWC) is utilized in many studies to analyze the temporal characteristics of brain connectivity. However, spurious artifacts have been reported in simulated data using this technique. Several suggestions have been made through the development of the SWC technique. Recently, it has been proposed to utilize a SWC window length of 100 s given that the lowest nominal fMRI frequency is 0.01 Hz. The main pitfall is the loss of temporal resolution due to a large window length. In this work, we propose an average sliding window correlation (ASWC) approach that presents several advantages over the SWC. One advantage is the requirement for a smaller window length. This is important because shorter lengths allow for a more accurate estimation of transient dynamicity of functional connectivity. Another advantage is the behavior of ASWC as a tunable high pass filter. We demonstrate the advantages of ASWC over SWC using simulated signals with configurable functional connectivity dynamics. We present analytical models explaining the behavior of ASWC and SWC for several dynamic connectivity cases. We also include a real data example to demonstrate the application of the new method. In summary, ASWC shows lower artifacts and resolves faster transient connectivity fluctuations, resulting in a lower mean square error than in SWC.

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  • The sliding average temporal window method effectively aligns high-frequency remote sensing data with hourly precipitation observations on a consistent temporal scale, achieving temporal consistency for multi-source data matching.

    “This method effectively aligns the high-frequency remote sensing data with the hourly precipitation observations on a consistent temporal scale, thus achieving temporal consistency for multi-source data matching.”

    From A Machine Learning-Based Quality Control Algorithm for Heavy Rainfall Using Multi-Source Data (2025) · cites this paper as [50]

    The Mathematical Characterization of ASWC section describes averaging consecutive sliding-window correlations to improve estimates of functional connectivity, not aligning datasets on a common temporal scale. Searches for remote sensing, hourly precipitation, and temporal alignment found no passage in our copy addressing the claimed application. (LLM, conf=0.78)

    Experimental — accuracy not yet measured

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Authors
Vergara, V. M., Abrol, A., & Calhoun, V. D.
Affiliations
Mind Research Network (US)
Corresponding author
  • Vergara, Victor M.
  • Abrol, Anees
  • Calhoun, Vince D.
Venue
Human Brain Mapping
Publisher
Wiley
Published
2019-01-19
Volume
40
Issue
7
Pages
2089-2103
ISSN
  • 1065-9471 (ISSN-L)
  • 1097-0193
OpenAlex
W2908590807
Cited by
53
References
42
Citations by year
2026: 6 · 2025: 10 · 2024: 4 · 2023: 3 · 2022: 9 · 2021: 4 · 2020: 12 · 2019: 5
FWCI
4.36
Type
journal article
Language
en
Open access
Locations
  • Human Brain Mapping (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (2R01EB005846, R01REB020407, P20GM103472, P30GM1227, P30GM122734)
  • National Science Foundation (1539067/1631819)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Functional Brain Connectivity Studies
  • Social Sciences › Psychology › Experimental and Cognitive Psychology › Mental Health Research Topics
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Advanced MRI Techniques and Applications
Keywords
sliding window correlation, dynamic functional connectivity, functional MRI, temporal resolution, high-pass filtering
MeSH terms
Brain, Brain Mapping, Humans, Magnetic Resonance Imaging, Models, Neurological, Nerve Net, Artifacts

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