section_path: Research/Models/Pavlovian
section_name: Pavlovian
paragraph_text: Pavlovian
  
  Fear conditioning, also known as Pavlovian or classical conditioning, is a process of learning that involves pairing a neutral stimulus with an unconditional stimulus (US). A neutral stimulus is something like a bell, tone, or room that does not illicit a response normally where a US is a stimulus that results in a natural or unconditioned response (UR) – in Pavlov's famous experiment the neutral stimulus is a bell and the US would be food with the dog's salvation being the UR. Pairing the neutral stimulus and the US results in the UR occurring not only with the US but also the neutral stimulus. When this occurs the neutral stimulus is referred to as the conditional stimulus (CS) and the response the conditional response (CR). In the fear conditioning model of Pavlovian conditioning the US is an aversive stimulus such as a shock, tone, or unpleasant odor.