Figure 1.
Number of choices for puffs of a cigarette and money as a function of monetary reinforcer value. Error bars represent standard error of the mean.
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.