OPERANT CONDITIONING
Operant conditioning, also called instrumental conditioning, is a learning process where voluntary behaviors are modified by association with the addition or removal of reward or aversive stimuli. The frequency or duration of the behavior may increase through reinforcement or decrease through punishment or extinction.
CLASSIC CONDITIONING
Classic conditioning is defined as in which the conditioned stimulus is paired with and precedes the unconditioned stimuli until the conditioned stimulus alone is sufficient to elicit. In basic terms this means that it is pairing a desired signal with an expected expectation or feeling. This was proven in an experiment by Ivan Petrovich Pavlov (1849-1936) performing an experiment of ringing a bell moments before providing food to a dog. The bell was used as the signal that is used every time at the moment or just prior to the food being presented. After repeating this sequence a number of times the bell became the signal to the dog that food was about to be presented so the dog began to salivate when it heard the bell.