The question of whether hypnosis is an "altered state of consciousness" is debated among researchers and psychologists. Here are the main perspectives:
Yes, it is an altered state of consciousness
Some researchers argue that hypnosis involves a distinct state of consciousness characterized by focused attention, reduced peripheral awareness, and increased suggestibility.
This state differs from normal waking consciousness because of changes in brain activity patterns, such as altered connectivity and activity in areas related to attention and control.
Supporters point to neuroimaging studies showing unique brain patterns during hypnosis.
No, it is not an altered state of consciousness
Other researchers believe hypnosis does not represent a fundamentally different state but rather a form of normal psychological functioning.
They suggest hypnosis involves focused attention, expectation, and social role-playing without necessarily entering a unique or altered state.
According to this view, hypnotic phenomena can be explained by ordinary cognitive processes like imagination and motivation.
Summary
Hypnosis shows changes in subjective experience and brain function.
Whether these changes qualify as a separate "altered state" depends on how that term is defined.
The scientific community has not reached a consensus; the question remains open.