Increased cognitive workload evokes greater neurovascular coupling responses in healthy young adults.

PLoS One · 2021 · PMC8133445 · PMID 34010279

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showed a trendno p-value reported

The n -back performance showed a trend toward improvement; however, the extent of the improvement was minor when measured in participants of the current study.

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.