Theories of Everything with Curt Jaimungal

Aaron Schurger: Neuroscience Does Not Threaten Free Will

27 snips
Oct 30, 2025
Guest
Aaron Schurger
In this conversation, neuroscientist Aaron Schurger debunks the notion that the brain's 'readiness potential' undermines free will, reinterpreting it as stochastic neural noise. He clarifies the differences between spontaneous and reactive actions while addressing the implications of the Libet experiment. Schurger also explores the role of consciousness in initiating movement and discusses theories like Attention Schema Theory, emphasizing how it reshapes our understanding of personal identity and consciousness mechanisms.
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INSIGHT

Selection Bias In Libet Experiments

  • Libet-style studies select epochs that end in a movement and discard all non-movement epochs, biasing averages.
  • That selection produces reliable antecedents (like the readiness potential) without proving causation.
INSIGHT

Autocorrelated Neural Noise Shapes Signals

  • Neural noise is autocorrelated: values depend on recent past values, producing slow large fluctuations.
  • Autocorrelated noise plus a threshold gives slow climbs that resemble the readiness potential when trials are aligned to threshold crossings.
INSIGHT

Noise Plus Urgency Explains Timing

  • In Libet tasks participants have a weak 'imperative' to move soon, plus ongoing noise that determines precise timing.
  • Schurger's accumulator model shows noise primarily decides the crossing moment while a small urgency biases overall timing.
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