A behavioural therapy in which a person with a phobia is exposed to an extreme form of a phobic stimulus in order to reduce anxiety triggered by that stimulus. This takes place across a small number of long therapy sessions.
Flooding sessions are often longer than SD sessions
Flooding stops phobic responses very quickly. This may be because, without the option of avoidance behaviour, the client quickly learns that the phobic stimulus is harmless.
Extinction
A learned response is extinguished when the conditioned stimulus (e.g. a dog) is encountered without the unconditioned stimulus (e.g. being bitten). The result is that the conditioned stimulus no longer produces the conditioned response (fear).
In some cases the client may achieve relaxation in the presence of the phobic stimulus because they become exhausted by their own fear response