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.
Experiment 3. (a) Top-view of the 2×3 parallel texture background layout (black dots) and the target’s horizontal distances (plus symbols). (b) Targets at the same height in either the upper (open symbols) or lower (filed symbols) visual fields are judged not at their physical locations (plus symbols) but along implicit curved surfaces.
