Herrnstein and Loveland (1964) trained the pecking pigeon people peepers. These birds reliably pecked pictures containing people and did not peck pictures containing no people. What is this an example of?

This is an example of conceptual stimulus control

Explanation:

conceptual stimulus control is a phenomenon in operant conditioning that occurs when an organism behaves in one way in the presence of a given stimulus and another way in its absence.

comparative method

hope this : )

the roman empire began to fall