Elements of Classical conditioningExtinction• occurs in classical conditioning when a CR no longer

occurs when the CS is presented E.g. The Dog stopped salivating after a while when

Pavlov rang bell and did not present the food.

CC: Spontaneous Recovery• Reappearance of a C.R following a rest period (i.e. when no C.S is

presented)• But note: Spontaneous recovery occurred after the CR has been

extinguished (and a corresponding time gap)

E.g.For Pavlov’s experiment – 1. CS extinguished (i.e. bell – no food (UCS) – No response (CR)2. After a time gap 3. The CS (bell) is presented again (without the UCS - food) & the CR

results (salivation occurs)4. The CR has spontaneously recovered

Extinction & Spontaneous Recovery