Blough (1975)used Two Different Fixed-Ratio Schedules to Reward Pigeons for Pecking

Multiple Choice

Blough (1975) used two different fixed-ratio schedules to reward pigeons for pecking at lights below or above 597nm.He found that pecking:

A) gradually decreased as the wavelength of the light increased.
B) gradually increased as the wavelength of the light increased.
C) was lowest just above 597nm and highest just below 597nm.
D) was highest just above 597nm and lowest just below 597nm.