Piaget used the three-mountain problem to assess a child's level of

a. object permanence.
b. scaffolding

_______________ mimic the action of endorphins

a. Barbiturates b. Opiates c. Depressants d. Psychedelics

What is the partial reinforcement effect?

a) learning under partial reinforcement is more difficult b) extinction after partial reinforcement is more difficult c) learning under continuous reinforcement is more difficult d) extinction after continuous reinforcement is more difficult