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.
Note. Scores represent mean time to last response with 4 boxes. Error bars represent standard error of the mean. (** p < 0.005).
