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.
A. Average time, in seconds, for all mice to reach the goal box during initial acquisition, extinction, and reacquisition. B. Average time, in seconds, for the 5 least persistent mice and the 5 most persistent mice identified during extinction. Brackets indicate standard error of the mean.
