You Don’t Need LSD to Hallucinate

Participants in a sensory deprivation experiment reported having hallucinations after just fifteen minutes.

They then put the participants, one by one, in a dark anechoic chamber which shields all incoming sounds and deadens any noise made by the participant. The room had a ‘panic button’ to stop the experiment but apparently no-one needed to use it.

Turns out when we have no external stimuli, we superimpose our own patterns.  [via]

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