The perceptual saliency of fearful eyes and smiles: A signal detection study Elsherif, Mahmoud Medhat ; Saban, Muhammet Ikbal ; Rotshtein, Pia Abstract Publication: PLoS ONE Pub Date: March 2017 DOI: 10.1371/journal.pone.0173199 Bibcode: 2017PLoSO..1273199E