Change in an organism"s behavior or thought as a result of experience. Process of responding less strongly over time to a repeated stimuli (ex: sleeping through one"s own snoring) Responding more strongly over time to repeated exposure of stimuli. Discovered classical conditioning on research of digestion in dogs. Classical conditioning for of learning in which animals come to respond to previously neural stimulus that had ben paired with another stimulus that elicits an automatic response. Unconditioned stimulus (ucs) stimulus that elicits an automatic response. Unconditioned response (ucr) automatic response to a nonneutral stimulus that does not need to be learned. Define conditioned stimulus (cs) and a conditioned response (cr). Conditioned stimulus (cs) initially neutral stimulus that comes to elicit a response due to association with an unconditioned stimulus. Conditioned response (cr) response previously associated with a nonneutral stimulus that is elicited by a neutral stimulus through conditioning: what is acquisition? learning phase during which a conditioned response (cr) is established.