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megimoo
05-05-2009, 11:04 AM
All too often, creativity goes hand in hand with mental illness. Now we're starting to understand why. Roger Dobson reports

At first glance, Einstein, Salvador Dali, Tony Hancock, and Beach Boy Brian Wilson would seem to have little in common. Their areas of physics, modern art, comedy, and rock music, are light years apart. So what, if anything, could possibly link minds that gave the world the theory of relativity, great surreal art, iconic comedy, and songs about surfing?

According to new research, psychosis could be the answer. Creative minds in all kinds of areas, from science to poetry, and mathematics to humour, may have traits associated with psychosis. Such traits may allow the unusual and sometimes bizarre thought processes associated with mental illness to fuel creativity. The theory is based on the idea that there is no clear dividing line between the healthy and the mentally ill. Rather, there is a continuum, with some people having psychotic traits without having the debilitating symptoms.

Mental illnesses have been around for thousands of years. Evolutionary theory suggests that in order for them to be still here, there must be some kind of survival advantage to them. If they were wholly bad, it's argued, natural selection would have seen them off long ago. In some cases the advantage is clear. Anxiety, for example, can be a mental illness with severe symptoms and consequences, but it is also a trait that at a non-clinical level has survival advantages. In healthy proportions, it keeps us alert and on our toes when threats are sensed.

It's now increasingly being argued that there are survival advantages to others forms of illness, too, because of the links between the traits associated with them and creativity. "It can be difficult for people to reconcile mental illness with the idea that traits may not be disabling. While people accept that there are health benefits to anxiety, they are more wary of schizophrenia and manic depression," says Professor Gordon Claridge, emeritus professor of abnormal psychology at Oxford University, who has edited a special edition of the journal Personality and Individual Differences, looking at the links between mental illness and creativity. "There is now a feeling that these traits have survived because they have some adaptive value. To be mildly manic depressive or mildly schizophrenic brings a flexibility of thought, an openness, and risk-taking behaviour, which does have some adaptive value in creativity. The price paid for having those traits is that some will have mental illness."

Research is providing support for the idea that creative people are more likely to have traits associated with mental illness. One study found that the incidence of mood disorders, suicide and institutionalisation to be 20 times higher among major British and Irish poets in the 200 years up to 1800. Other studies have shown that psychiatric patients perform better in tests of abstract thinking. Another study, based on 291 eminent and creative men in different fields, found that 69 per cent had a mental disorder of some kind. Scientists were the least affected, while artists and writers had increased diagnoses of psychosis.

"Most theorists agree that it is not the full-blown illness itself, but the milder forms of psychosis that are at the root of the association between creativity and madness," says Emilie Glazer, experimental psychologist and author of one of the Oxford journal papers. "The underlying traits linked with mild psychopathology enhance creative ability. In severe form, they are debilitating."

Research is also showing that traits associated with different mental illnesses have different effects on creativity. The creativity needed to develop the theory of relativity, is, for example, very different from that required for producing surreal paintings, or poetry.

Research is now homing in on whether the psychosis that is linked to different types of creativity comes through schizophrenia and schizotypy traits, through manic-depressive or cyclothymic traits, or traits associated with the autism and Asperger's disorders. A study at the University of Newcastle found significant differences between artistically creative people and mathematicians. While the artists showed schizotypy traits, mathematicians did not, and that fits in with the idea that mathematics and engineering, which require attention to detail, are closer to the autistic traits than to psychosis.
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