Dr. Santos is investigating the positive effects of drugs using an animal model paradigm. She establishes two different cages: cage A is neutral and drug-free, while cage B contains a drug. She exposes the animal to both cages and records the amount of time the animal spends in each cage in an attempt to assess the positive effects of the "drug environment." Which type of model is she using?

A) Operant discriminant model

B) Classically conditioned preference model

C) Shaped preference model

D) Conditioned place preference

Answer: The answer is D--. Conditioned Place preference

Explanation:

Conditioned place preference also called place conditioning is a procedure for assessing the efficacy of drugs using a classical procedure. it involves the use of animals and making them experience two distinct environments, one having drug states or and the other having a non-drug neutral state to analyse effects of drugs in such animals.

Dr. Santos trying to investigate the positive effects of drugs using an animal model paradigm by placing two different cage, A is neutral and drug-free, while cage B contains a drug uses Conditioned Place preference model.