Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
The relationship between the size of the internal features of each face and the mean percentage effect of the illusion. The ratio of internal to external features is calculated from the extent of the internal features (top of eyes to bottom of mouth) as a proportion of the whole head height. James Corden's face (black triangle) shows nearly the smallest ratio of internal to external features. The extreme faces, square and diamond, are shown in Figure 6.
