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) Top view of apparatus and (b) procedure for studying pigeon color (hue) discrimination including a split field of two wavelengths of light, same/different ‘report’ pecking keys, and variable reinforcement probability (for correct responses) to generate receiver operating characteristics (ROCs) on (c) linear and (d) z-score axes.
