This approach tries to identify antecedents and consequences of behaviour. 3 types of learning: classical conditioning, operant or instrumental conditioning, observation learning. Learning: a relatively durable change in behaviour that occurs as a result of practice or experience. Conditioning: is the learning of associations between 2 things on 2 events. A response that is automatic or reflexive and requires no prior learning. The response is involuntary: unconditioned stimulus (us): A stimulus that precedes and elicits (triggers) the unconditional response: conditioned stimulus (cs): Any stimulus that is paired with the unconditioned stimulus that eventually elicits a response identical to the unconditioned response: conditioned response (cr) The response that is elicited by the conditioned stimulus and it"s identical to the unconditioned response. Pairing of the unconditional stimulus & conditional stimulus. People more likely to develop phobias to things than others because of evolution.