Archive for November, 2015

P3b signal

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There appears no reason to reconsider the main drift of the distinctions between unconscious processing and conscious processing that has emerged in recent neuroscience, solely in the light of Silverstein and Snodgrass’s findings relative to the P3b signal. The P3b signal was formerly known as the P300 signal, but this latter is now seen as having two sub-components; the first of these, the P3a signal is mainly involved with directing attention, while P3b is involved with responding to more unusual stimuli, as opposed to routine stimuli. The signal is often correlated with conscious process of information in frontal brain regions. However, Silverstein and Snodgrass showed that it could also be stimulated by signals that were too short, or were masked so that they could not enter consciousness, but could nevertheless effect unconscious processing.

Quantum entanglement

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The argument about entanglement goes back to Einstein. The notorious EPR (Einstein/Podolsky/Rosen) thought experiment of 1935 demonstrated that if quantum mechanics was correct then the determination of the state of one quantum particle could instantaneously and over any distance determine the state of another particle. This was afterwards referred to as entanglement or quantum entanglement.