Cosmetics as a Feature of the Extended Human Phenotype: Modulation of the Perception of Biologically Important Facial Signals Etcoff, Nancy L. ; Stock, Shannon ; Haley, Lauren E. ; Vickery, Sarah A. ; House, David M. Abstract Publication: PLoS ONE Pub Date: October 2011 DOI: 10.1371/journal.pone.0025656 Bibcode: 2011PLoSO...625656E