Suggestibility is a term used in hypnosis to describe how suggestible a person is. In other words, how a person responses to a suggestion.
For example, a hypnotist may ask the person to swing his right hand forward in a big round.
Some people respond by swinging the hand backwards. Some may swing in a smaller circle. Some swing the left hand instead of right. Some may not do so as instructed.
Suggestibility is a means for the hypnotist to gauge a person’s ability to co-operate and follow instruction.