While trying to study in the library, you are distracted by two students who are arguing about which CS-UCS time interval is most effective. One student claims that a second or less is best,

but the other is positive that longer intervals of five to fifteen seconds work best. Finally, you go over and tell them that the

a. shorter the interval the better.
b. longer the interval the better.
c. optimal interval most depends upon the person who is being conditioned.
d. optimal interval most depends upon the response being conditioned.

Answer: d. optimal interval most depends upon the response being conditioned.