Flooding is the therapy that is not based on classical conditioning. Hence, the suitable option choice for this question will be option (2).
A biologically powerful stimulus, such as food, is matched with a previously neutral stimulus during classical conditioning (e.g. a triangle). It also describes the subsequent learning process that occurs as a result of this pairing, in which the weak stimulus eventually learns to elicit a response (like salivation) that is typically comparable to the response induced by the strong stimulus.
Operant conditioning, sometimes regarded to as instrumental conditioning, is a type of conditioning in which a voluntary behavior's strength is changed by rewarding or punishing it. Classically conditioned cues may enhance opportunistic reactions. Opportunistic conditioning, however, can be impacted in a number of ways by classical conditioning.
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The complete question is mentioned below :
Which therapy is NOT based on classical conditioning?
1. systematic desensitization
2. flooding
3. aversion therapy
4. token economy