In the view of many learning theorists, pairing a neutral and unconditioned stimulus is not enough to produce classical conditioning; the neutral stimulus must __________ the unconditioned stimulus

According to Freud, the _____ is the psychic energy that fuels the entire personality

a) preconscious b) id ideal c) libido d) ego ideal

If you conduct a study and predict that X causes Y, then X is the ____ variable

a. internal b. external c. independent d. dependent variable