Fig 1. Example stimuli.
Schematic diagram showing the fixation cross displayed with (A) a blurred stimulus dot, (B) a clear stimulus dot, and (C) a cue, presented alone against the circular background.
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.