Cosmetics as a feature of the extended human phenotype: modulation of the perception of biologically important facial signals.

PLoS One · 2011 · PMC3185017 · PMID 21991328

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only marginally significantno p-value reported

However, luminance contrast effects for our natural look compared to a face without makeup was only marginally significant.

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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.