A procedure 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

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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.