Free Will vs. the Programmed Brain

If our actions are determined by prior events, then do we have a choice about anything-or any responsibility for what we do?

By Shaun Nichols

Many scientists and philosophers are convinced that free will doesn?t exist at all. According to these skeptics, everything that happens is determined by what happened before?our actions are inevitable consequences of the events leading up to the action?and this fact makes it impossible for anyone to do anything that is truly free. This kind of anti-free will stance stretches back to 18th century philosophy, but the idea has recently been getting much more exposure through popular science books and magazine articles. Should we worry? If people come to believe that they don?t have free will, what will the consequences be for moral responsibility?

In a clever new study, psychologists Kathleen Vohs at the University of Minnesota and Jonathan Schooler at the University of California at Santa Barbara tested this question by giving participants passages from The Astonishing Hypothesis, a popular science book by Francis Crick, a biochemist and Nobel laureate (as co-discoverer, with James Watson, of the DNA double helix). Half of the participants got a passage saying that there is no such thing as free will. The passage begins as follows: ??You,? your joys and your sorrows, your memories and your ambitions, your sense of personal identity and free will, are in fact no more than the behavior of a vast assembly of nerve cells and their associated molecules. Who you are is nothing but a pack of neurons.?
The passage then goes on to talk about the neural basis of decisions and claims that ??although we appear to have free will, in fact, our choices have already been predetermined for us and we cannot change that.? The other participants got a passage that was similarly scientific-sounding, but it was about the importance of studying consciousness, with no mention of free will.

After reading the passages, all participants completed a survey on their belief in free will. Then comes the inspired part of the experiment. Participants were told to complete 20 arithmetic problems that would appear on the computer screen. But they were also told that when the question appeared, they needed to press the space bar, otherwise a computer glitch would make the answer appear on the screen, too. The participants were told that no one would know whether they pushed the space bar, but they were asked not to cheat.

The results were clear: those who read the anti-free will text cheated more often! (That is, they pressed the space bar less often than the other participants.) Moreover, the researchers found that the amount a participant cheated correlated with the extent to which they rejected free will in their survey responses.

Varieties of Immorality

Philosophers have raised questions about some elements of the study. For one thing, the anti-free will text presents a bleak worldview, and that alone might lead one to cheat more in such a context (?OMG, if I?m just a pack of neurons, I have much bigger things to worry about than behaving on this experiment!?). It might be that one would also find increased cheating if you gave people a passage arguing that all sentient life will ultimately be destroyed in the heat death of the universe.

On the other hand, the results fit with what some philosophers had predicted. The Western conception idea of free will seems bound up with our sense of moral responsibility, guilt for misdeeds and pride in accomplishment. We hold ourselves responsible precisely when we think that our actions come from free will. In this light, it?s not surprising that people behave less morally as they become skeptical of free will. Further, the Vohs and Schooler result fits with the idea that people will behave less responsibly if they regard their actions as beyond their control. If I think that there?s no point in trying to be good, then I?m less likely to try.

Even if giving up on free will does have these deleterious effects, one might wonder how far they go. One question is whether the effects extend across the moral domain. Cheating in a psychology experiment doesn?t seem too terrible. Presumably the experiment didn?t also lead to a rash of criminal activity among those who read the anti-free will passage. Our moral revulsion at killing and hurting others is likely too strong to be dismantled by reflections about determinism. It might well turn out that other kinds of immoral behavior, like cheating in school, would be affected by the rejection of free will, however.

Is the Effect Permanent?

Another question is how long-lived the effect is. The Vohs and Schooler study suggests that immediately after people are made skeptical of free will, they cheat more. But what would happen if those people were brought back to the lab two weeks later? We might find that they would continue to be skeptical of free will but they would no longer cheat more.sciam.com

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~ by DarkLight on August 21, 2008.

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