Hypnosis Theory

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Around 15% of people are susceptible to hypnosis, whereas around 10% of people are resistant to hypnosis. This means that the majority of people, 75% are in between. There are two theories that debate whether hypnosis is an altered state of consciousness, or simply a state of deep relaxation.

One theory is the State Theory, developed by Hilgard in the 1900s. Hilgard believed that hypnosis is a special, altered state of consciousness (also called a hypnotic trance), similar to sleep or dreaming. The State Theory states that our consciousness is made up of separate adjacent channels and that under hypnosis, the channels dissociate (separate away from each other) so that our main consciousness is focused on the hypnotist and their suggestions. …show more content…

One example of this is the cold pressor test (CPT) in which people under hypnosis are able to withstand having their arm submerged in icy water for far longer than those not under hypnosis. Another example is the ‘human plank’ experiment, where a hypnotised person is able to lay across the backs of two chairs placed back-to-back. However, Barber and Hahn showed that motivated participants may be able to decrease their experience of cold pressor pain just as much as those thought to be hypnotised, suggesting that these experiments work as the participants are motivated - not hypnotised. We can also withstand pain without hypnosis, for example, when we willingly get tattoos or piercings.

Further evidence is the apparent analgesic effect of hypnosis. Hypnosurgery using hypnosis as an analgesic during surgery is now being used by the NHS, and it is also used as an alternative to anaesthetic, and as pain relief for chronic cancer pain. An advantage of this evidence is that demand characteristics are unlikely here - it is difficult to ignore pain or pretend that you are not in pain. In fact, Knox et al (1947) found that in highly susceptible subjects, ischaemic pain was rated as 1/10 when hypnotised compared to 9/10 when not hypnotised, which provides support for the analgesic properties of

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