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Plain English Summary
Can your mind cause quantum events to 'decide' what they are? This experiment tested one of physics' wildest ideas: that consciousness forces particles to settle into a definite state ('collapsing the wave-packet'). Thirty volunteer pairs either saw, or didn't see, a display triggered by radioactive decay. Then a second person heard a beep while their brain activity was recorded. In 3 of 10 comparisons, brain responses differed significantly depending on whether someone had already peeked -- and these differences appeared in early unconscious signals, before awareness kicked in. Not definitive proof, but a surprising nudge toward observation mattering at the quantum level.
Research Notes
One of few direct experimental tests of the von Neumann-Wigner consciousness-causes-collapse interpretation using objective EEG measures rather than verbal reports. Methodological precursor to Radin's double-slit observer experiments. Speaks to Controversy #4 (double-slit/quantum observer effects).
Refined conceptual replication of Hall et al.'s (1977) experiment testing whether conscious observation collapses the quantum wave-packet. Thirty volunteer pairs observed radioactive decay events detected by a Geiger-Mueller counter. A pre-observer randomly saw (or did not see) a visual representation of each quantum event; one second later, a final observer heard an audio beep while EEG was recorded from 14 electrodes. Three of 10 peak amplitude comparisons showed significant differences between pre-observed and non-pre-observed conditions (overall exact binomial p=0.0115). Significant effects appeared in early pre-conscious EEG components, consistent with the subjective reduction hypothesis, though the author acknowledges the evidence is not definitive.
Related Papers
Companion
- Testing Nonlocal Observation as a Source of Intuitive Knowledge — Radin, Dean (2008)
- Psychophysical Modulation of Fringe Visibility in a Distant Double-Slit Optical System — Radin, Dean (2016)
- Observer Influence on Quantum Interference: Testing the von Neumann-Wigner Consciousness-Collapse Theory — Radin, Dean (2025)
- Intentional Observer Effects on Quantum Randomness: A Bayesian Analysis Reveals Evidence Against Micro-Psychokinesis — Maier, Markus A (2018)
- Experimental evidence of non-classical brain functions — Kerskens, Christian Matthias (2022)
- The Mental Universe — Henry, Richard Conn (2005)
- Extrasensory Perception and Quantum Models of Cognition — Tressoldi, Patrizio E (2010)
- Consciousness in the Universe: Neuroscience, Quantum Space-Time Geometry and Orch OR Theory — Penrose, Roger (2011)
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Psychophysical Interactions with a Double-Slit Interference Pattern: Exploratory Evidence of a Causal Influence
📋 Cite this paper
Bierman, Dick J (2003). Does Consciousness Collapse the Wave-Packet?. Mind and Matter.
@article{bierman_2003_does,
title = {Does Consciousness Collapse the Wave-Packet?},
author = {Bierman, Dick J},
year = {2003},
journal = {Mind and Matter},
}