Is known for using little albert in his studies on human emotion.

The answer is "John B. Watson".

The Little Albert Experiment showed that classical conditioning, the relationship of a specific stimulus or conduct with a disconnected stimulus or conduct, works in people. In the investigation, John Watson was successful in conditioning a formerly unafraid infant to result being afraid of a white rat.

it is due to the halo effect as the impression of the boy created earlier.on the mind of the principle affected his decision

they had freedom from the government and from the affairs