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.
Illustration of line drawing scenes used in Experiment 3: (a) Background 1 with the lines cut off below the vanishing point, (b) background 2 with the lines converging to a visible point, (c) Background 3 with the lines converging to a point at the Background 1 cut-off height.
