Brandon Keim writing in Wired Magazine:
04.13.08 | 1:00 PM
Brain Scanners Can See Your Decisions Before You Make Them
This schematic shows the brain regions (green) from which the outcome of a participant’s decision can be predicted before it is made.
… In a study published Sunday in Nature Neuroscience, researchers using brain scanners could predict people’s decisions seven seconds before the test subjects were even aware of making them. The decision studied — whether to hit a button with one’s left or right hand — may not be representative of complicated choices that are more integrally tied to our sense of self-direction. Regardless, the findings raise profound questions about the nature of self and autonomy: How free is our will? Is conscious choice just an illusion?
… John-Dylan Haynes updated a classic experiment by the late Benjamin Libet, who showed that a brain region involved in coordinating motor activity fired a fraction of a second before test subjects chose to push a button. Later studies supported Libet’s theory that subconscious activity preceded and determined conscious choice — but none found such a vast gap between a decision and the experience of making it as Haynes’ study has.
In the seven seconds before Haynes’ test subjects chose to push a button, activity shifted in their frontopolar cortex, a brain region associated with high-level planning. Soon afterwards, activity moved to the parietal cortex, a region of sensory integration. Haynes’ team monitored these shifting neural patterns using a functional MRI machine. Taken together, the patterns consistently predicted whether test subjects eventually pushed a button with their left or right hand — a choice that, to them, felt like the outcome of conscious deliberation. For those accustomed to thinking of themselves as having free will, the implications are far more unsettling than learning about the physiological basis of other brain functions…
Caveats remain, holding open the door for free will. For instance, the experiment may not reflect the mental dynamics of other, more complicated decisions. “Real-life decisions — am I going to buy this house or that one, take this job or that — aren’t decisions that we can implement very well in our brain scanners,” said Haynes. Also, the predictions were not completely accurate. Maybe free will enters at the last moment, allowing a person to override an unpalatable subconscious decision. “We can’t rule out that there’s a free will that kicks in at this late point,” said Haynes, who intends to study this phenomenon next. “But I don’t think it’s plausible.” …
Here is a somewhat different angle:
When the human ego realises that its will is a tool, its wisdom ignorance and childishness, its power an infant’s groping, its virtue a pretentious impurity, and learns to trust itself to that which transcends it, that is its salvation. The apparent freedom and self-assertion of our personal being to which we are so profoundly attached, conceal a most pitiable subjection to a thousand suggestions, impulsions, forces which we have made extraneous to our little person. Our ego, boasting of freedom, is at every moment the slave, toy and puppet of countless beings, powers, forces, influences in universal Nature. The self-abnegation of the ego in the Divine is its self-fulfilment; its surrender to that which transcends it is its liberation from bonds and limits and its perfect freedom…
At best we have only the poor relative freedom which by us is ignorantly called free-will. But that is at bottom illusory, since it is the modes of Nature that express themselves through our personal will; it is force of Nature, grasping us, ungrasped by us that determines what we shall will and how we shall will it. Nature, not an independent ego, chooses what object we shall seek, whether by reasoned will or unreflecting impulse, at any moment of our existence…
The mind rides on a swirl of natural forces, balances on a poise between several possibilities, inclines to one side or another, settles and has the sense of choosing: but it does not see, it is not even dimly aware of the Force behind that has determined its choice. It cannot see it, because that Force is something total and to our eyes indeterminate. At most mind can only distinguish with an approach to clarity and precision some out of the complex variety of particular determinations by which this Force works out her incalculable purposes. Partial itself, the mind rides on a part of the machine, unaware of nine-tenths of its motor agencies in Time and environment, unaware of its past preparation and future drift; but because it rides, it thinks that it is directing the machine. In a sense it counts: for that clear inclination of the mind which we call our will, that firm settling of the inclination which presents itself to us as a deliberate choice, is one of Nature’s most powerful determinants; but it is never independent and sole. Behind this petty instrumental action of the human will there is something vast and powerful and eternal that oversees the trend of the inclination and presses on the turn of the will.
(Sri Aurobindo, The Synthesis of Yoga)
