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A hallucination is a false sensory perception in the absence of an external stimulus, as distinct from an illusion, which is a misperception of an external stimulus. Hallucinations may occur in any sensory modality - visual, auditory, olfactory, gustatory, tactile, or mixed.

Hostile Media Effect

The hostile media effect, sometimes called the hostile media phenomenon, refers to the finding that ideological partisans sometimes think that media coverage is biased against their particular interests in an issue. This phenomenon has been identified experimentally.


Humanism is an active ethical and philosophical approach to life focusing on human solutions to human issues through rational arguments without recourse to a god, gods, sacred texts or religious creeds.


Hypnosis is a psychological state whose existence and effects are strongly debated. The act of inducing a hypnotic state is referred to as an induction procedure.


Hypnotherapy is the application of hypnosis as a form of treatment, usually for relieving pain or conditions related to one's state of mind. Practitioners believe that when a client enters, or believes he has entered, a state of trance, the patient is more receptive to suggestion and other therapy.


History is a term used to describe information about the past. When used as the name of a field of study, history refers to the study and interpretation of the record of human societies.