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- W2116767467 abstract "Abstract Group‐level functional connectivity analyses often aim to detect the altered connectivity patterns between subgroups with different clinical or psychological experimental conditions, for example, comparing cases and healthy controls. We present a new statistical method to detect differentially expressed connectivity networks with significantly improved power and lower false‐positive rates. The goal of our method was to capture most differentially expressed connections within networks of constrained numbers of brain regions (by the rule of parsimony). By virtue of parsimony, the false‐positive individual connectivity edges within a network are effectively reduced, whereas the informative (differentially expressed) edges are allowed to borrow strength from each other to increase the overall power of the network. We develop a test statistic for each network in light of combinatorics graph theory, and provide p ‐values for the networks (in the weak sense) by using permutation test with multiple‐testing adjustment. We validate and compare this new approach with existing methods, including false discovery rate and network‐based statistic, via simulation studies and a resting‐state functional magnetic resonance imaging case–control study. The results indicate that our method can identify differentially expressed connectivity networks, whereas existing methods are limited. Hum Brain Mapp 36:5196–5206, 2015 . © 2015 Wiley Periodicals, Inc." @default.
- W2116767467 created "2016-06-24" @default.
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- W2116767467 date "2015-09-29" @default.
- W2116767467 modified "2023-09-23" @default.
- W2116767467 title "A parsimonious statistical method to detect groupwise differentially expressed functional connectivity networks" @default.
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- W2116767467 doi "https://doi.org/10.1002/hbm.23007" @default.
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