The pattern of human behavior that characterizes psychological dependence closely parallels which behavior in animals?

The ability of animals to self - administer a medication, has been regarded as pattern of human behavior that is closely related to animal behavior.

For example; if a catheter is inserted to administer drug in animals, the ability of the animals to press the lever of the catheter, so to it can imbibe the drug is a psycho-cognitive dependence. And it a unique act of animals which is peculiar to human and therefore showed parallelism between the two.