Conspiracy Theories

Snapshot · Conspiracy Theories

The Mind-Bending MK Ultra Experiments of Dr Ewen Cameron

Explore episode Jun 24, 2026

Where this was said

The Origins of Psychic Driving: From Brainwashing Theory to Tape Loops

At 14:15 · chapter starts 9:50

In 1951, Cameron reads a theory by British psychiatrist Dr. William Sargent arguing that communists have unlocked mind manipulation through extreme stress. This sparks an idea: if extreme stress can make someone susceptible to persuasion, could it also wipe the mind clean, creating a blank slate to rebuild from scratch? Cameron calls this theoretical technique psychic driving. His second inspiration is less academic — a novelty sleep-learning device called the Cerebrophone (later the Dormophone), designed to teach languages overnight by repeating phrases under the pillow. Cameron merges the two concepts: first he conducts traditional therapy to identify a patient's psychological weaknesses, then records a deeply negative scripted message — sometimes in the patient's own voice, sometimes a family member's — and plays it on a continuous loop for 10 to 20 hours a day, for days on end. An example message directed at a patient named Gertrude attacks her relationships, her jealousy, and her need for control. Carter Roy plays a distorted version to illustrate how Cameron further manipulated the tapes: sped up, slowed down, given an echo. The effect on patients is visceral — agitation, screaming, feelings of hearing voices inside one's own head. To prevent them from escaping the recordings, Cameron drugs them, uses hypnosis, or in one case physically secures headphones beneath a helmet so a patient cannot remove them.

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