You Are Not So Smart 334 - Magical Thinking - Matt Tompkins (rebroadcast)
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Mar 2, 2026 Matt Tompkins, an Oxford‑educated experimental psychologist and magician studying deception and magical thinking. He recounts Clever Hans, how unconscious cues and double‑blind tests reshaped experiments, and how magicians help reveal perception, memory, and false testimony. Short takes on fake mind‑reading devices, cold reading, and why magical thinking persists in modern culture.
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Idiomotor Effect Explains Apparent Supernatural Movement
- The idiomotor effect explains involuntary, unconscious muscle movements that create the illusion of external agency.
- This effect accounts for pendulum motion, Ouija boards, dowsing rods, and table turning without invoking spirits or telepathy.
Blind Controls Revealed Unconscious Cueing
- The Hans Commission used progressive controls and blindfolding to show Hans only succeeded when the questioner could see the answer.
- Accuracy fell from 50/56 to 2/35 when the asker was blindfolded, revealing unconscious human cueing, not animal arithmetic.
Always Use Double Blind Controls In Behavioral Tests
- Use double-blind controls to prevent experimenter cueing when studying behavior or claimed abilities.
- Ensure facilitators cannot see the correct answers or stimuli to avoid unconscious influence, as in facilitated communication controls.
