View Only Articles , Only References , Everything

Monday, April 21, 2008

Decision-making May Be Surprisingly Unconscious Activity

ScienceDaily.com
A team of scientists has unraveled how the brain actually unconsciously prepares our decisions. Even several seconds before we consciously make a decision its outcome can be predicted from unconscious activity in the brain. (Thanks to Scott.)

So what does this mean for passages such as Matthew 5:21?
"You have heard that it was said to the people long ago, 'Do not murder, and anyone who murders will be subject to judgment.'
But I tell you that anyone who is angry with his brother will be subject to judgment. Again, anyone who says to his brother, 'Raca,' is answerable to the Sanhedrin. But anyone who says, 'You fool!' will be in danger of the fire of hell.


In light of this research, that seems extreme. How is one accountable for "Flash" Anger? How does one prevent "Flash" Anger? If a large percentage of your action or decision is prepared in the "background" how much of that are we in control of? I'll stipulate that we have the final choice, but how we feel about it is quite another thing. The brain is like a modular unit. Its made up of modular circuitry that have processes that run in background of which we are not aware. Any poor performance in any one of those circuits could cause us to do something or feel someway we wouldn't normally. For example lack of sleep and the resultant crabbiness that accompanies it. It seems extreme to put our fates in the hands of a three pound meatball that is so easily influenced to operate outside of "specifications"


Excerpts from the article.

This unprecedented prediction of a free decision was made possible by sophisticated computer programs that were trained to recognize typical brain activity patterns preceding each of the two choices. Micropatterns of activity in the frontopolar cortex were predictive of the choices even before participants knew which option they were going to choose. The decision could not be predicted perfectly, but prediction was clearly above chance. This suggests that the decision is unconsciously prepared ahead of time but the final decision might still be reversible.

More than 20 years ago the American brain scientist Benjamin Libet found a brain signal, the so-called "readiness-potential" that occurred a fraction of a second before a conscious decision. Libet’s experiments were highly controversial and sparked a huge debate. Many scientists argued that if our decisions are prepared unconsciously by the brain, then our feeling of "free will" must be an illusion. In this view, it is the brain that makes the decision, not a person’s conscious mind. Libet’s experiments were particularly controversial because he found only a brief time delay between brain activity and the conscious decision.

In contrast, Haynes and colleagues now show that brain activity predicts -- even up to 7 seconds ahead of time -- how a person is going to decide. But they also warn that the study does not finally rule out free will: "Our study shows that decisions are unconsciously prepared much longer ahead than previously thought. But we do not know yet where the final decision is made. We need to investigate whether a decision prepared by these brain areas can still be reversed."
Email this article

No comments: