| A | B |
| Classical Conditioning | Learning where a stimulus is used to evoke a response |
| Unconditioned Stimulus (UCS) | Stimulus that produces a response without previous conditioning |
| Conditioned Stimulus (CS) | A stimulus that produces a learned reaction, formerly the NS |
| Conditioned Response (CR) | Learned reaction to a stimulus gained through conditioning |
| Neutral Stimulus (NS) | Stimulus which produces no reaction prior to conditioning, becomes the CS |
| Unconditioned Response (UCR) | An unlearned reaction to the UCS prior to conditioning |
| Acquisition | Creation of a new response through conditioning |
| Extinction | Disappearance of a response over time, occurs when the CS is presented without the UCS |
| Spontaneous Recovery | The formerly extinct CS reappears after a random exposure to the CS |
| Stimulus Generalization | When a subject learns a response to one specific stimulus but exhibits the same response to similar stimuli |
| Stimulus Discrimination | Whena subject learns a response to a specific stimulus but does not have the same response to similar stimuli |