Investigating the effect of data length on the performance of frequency-domain fNIRS functional connectivity measures

Ishara Paranawithana, Darren Mao, Colette M. McKay, Yan T. Wong

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review


Resting-state functional connectivity is a promising tool for understanding and characterizing brain network architecture. However, obtaining uninterrupted long recording of resting-state data is challenging in many clinically relevant populations. Moreover, the interpretation of connectivity results may heavily depend on the data length and functional connectivity measure used. We compared the performance of three frequency-domain connectivity measures: magnitude-squared, wavelet and multitaper coherence; and the effect of data length ranging from 3 to 9 minutes. Performance was characterized by distinguishing two groups of channel pairs with known different connectivity strengths. While all methods considered improved the ability to distinguish the two groups with increasing data lengths, wavelet coherence performed best for the shortest time window of 3 minutes. Knowledge of which measure is more reliably used when shorter fNIRS recordings are available could make the utility of functional connectivity biomarkers more feasible in clinical populations of interest.

Original languageEnglish
Title of host publication2023 45th Annual International Conference of the IEEE Engineering in Medicine & Biology Society (EMBC)
EditorsBeena Ahmed, JongMo Seo
Place of PublicationPiscataway NJ USA
PublisherIEEE, Institute of Electrical and Electronics Engineers
Number of pages4
ISBN (Electronic)9798350324471
ISBN (Print)9798350324488
Publication statusPublished - 2023
EventInternational Conference of the IEEE Engineering in Medicine and Biology Society 2023 - Sydney, Australia
Duration: 24 Jul 202327 Jul 2023 (Proceedings) (Website)


ConferenceInternational Conference of the IEEE Engineering in Medicine and Biology Society 2023
Abbreviated titleEMBC 2023
Internet address

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