Aprocedure through which one person uses the power of suggestion to induce changes in thoughts, feelings, sensations, perceptions, and behavior in another person is referred to as

I believe the answer is: Hypnosis
 
The main purpose of a hypnosis is to alter the conscious thought that people have which eventually make them perceive reality in a completely different way.
Up to this date, even after proofing its existence, science still hasn't be able to explain why and how hypnosis could happen.

Dcalifornia they have the most people with 200+ people per square mile