If a rat always receives a shock following the presentation of an 800-Hz tone, it will show a stronger fear response to the presentation of a(n) _____ tone than a _____ tone.
A) 820-Hz; 1000-Hz
B) 1000-Hz; 900-Hz
C) 620-Hz; 700-Hz
D) Both b and c are correct.
Question 2
If a pigeon always receives a frightening air blast following the presentation of a red light, it will show a stronger fear response to the presentation of a(n) _____ light than a(n) _____ light.
A) red; orange-reddish
B) orange-reddish; red
C) orange-reddish; orange
D) Both a and c are correct