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.
Hypothetical threshold tracking with the method of limits (left) and with the simple up-down procedure (right). The plus sign represents the correct responses whereas asterisk represents the incorrect responses. Note that the threshold trackings are identical up to trial n. 9. Both trackings start with a stimulus level of 6.
