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.
Paradigm design. At the beginning of each block of trials a calibration and a validation procedure were performed. After this, a fixation point was appeared for a duration of 1.5 s located in the center of the screen, and then, each image was displayed for 2 s. Then one page was appeared that asked for the answer of the subjects “Answer”. The next fixation point (next trial) was appeared 1 s after the answer and followed by the next image
