Herrnstein and others trained pigeons to respond to images of people. The researchers did this by
pinpointing a single defining feature (such as hair) on which the birds could discriminate humans
from other objects.
Completion

Question

Herrnstein and others trained pigeons to respond to images of people. The researchers did this by
pinpointing a single defining feature (such as hair) on which the birds could discriminate humans
from other objects. 
Completion

Quizplus · Accepted Answer

Herrnstein and Others Trained Pigeons to Respond to Images of People