The term convincer comes from the English verb "to convince," which means to persuade. In relation to hypnosis, this refers to a state of affairs that convinces the client (hypnosis recipient) that hypnosis is actually having an effect. Hypnosis is something that is difficult to grasp and understand. For most people coming into contact with hypnotherapy for the first time, it is difficult to distinguish its effects from a state of deep relaxation. This is where a convincer, that is, evidence that hypnosis works, comes in handy. This is useful for both the client and the hypnotist. Classic convincer is for example levitation of fingers, hands or arms. In trance here are physical, involuntary movement of these body parts, which does not occur consciously and thus proves the effect of hypnosis. Here the subconscious mind takes over the control and movement of the respective body parts.