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.
Examples of stimuli and their spatial organization. a) Upper left=Unilateral Single; Upper right=Bilateral Single; b) Middle left=Unilateral Diamond Quadruple; Middle right=Bilateral Quadruple Diamond; c) Lower left=Unilateral Quadruple Random; Lower right= Bilateral Quadruple Random.
