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.
The monkeys’ performance in Phase 2 of Experiment 1 as a function of trial type. The Equal trial type is excluded because there was no correct response in these trials. The horizontal line indicates chance performance. Plus and minus signs represent performance significantly above and below chance level, respectively (two-tailed binomial test, p < 0.05).
