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 time-line diagram of a multiple schedule where reinforcers are available in both components according to VI 1-min schedules (60 reinforcers/hr) indicated by upper-case bold X's, and in one component, reinforcers are also presented independently of responding on a VT 30-s schedule (120 reinforcers/hr) indicated by lower-case x's.
