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.
Average individual performance for all participants. The dashed line represents the theoretical chance accuracy rate (25% for a 4-choice BCI); performance greater than chance levels according to the bootstrap randomization test indicated with *. Error bars shown for 1 se.
