“An important issue in face recognition research is whether faces are recognized on the basis of their individual features or more holistically, on the basis of their overall shape.”
“… subjects were less accurate at identifying the parts of faces, presented in isolation, than they were at identifying whole faces, even though both parts and wholes were tested in a forced-choice format and the whole faces differed only by one part.”
The full paper can be read here. Parts and Wholes in Face Recognition (Published in the Quarterly Journal of Experimental Psychology, 1993,46a (2) 225-245)
Coming soon : Recognitions – part 2 – Greebles