When the family dog licks the faces of the children in the family, they laugh and give the dog a treat. When the dog licks the faces of the parents, they scold the dog. As a result, the dog no longer licks the faces of the parents, but continues to lick the faces of the children. The parents' faces would be an example of a(n)_________ for the dog licking their faces:

a. negative reinforcer
b. S-delta
c. unconditioned stimulus
d. discriminative stimulus

b

Psychology

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According to Klohnen and Luo, potential mates were rated as most attractive if they exhibited all of the following traits EXCEPT being

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A rat must press a lever continuously for 10 minutes to earn a pellet of food. This is an example of a _____ schedule

A) ?fixed interval B) ?fixed ratio C) ?fixed duration D) ?fixed time

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