Dutch artist Vincent Van Gogh is widely theorised to have had bipolar disorder. Other notable creative people with bipolar disorder include Carrie Fisher, Demi Lovato, Kanye West, Stephen Fry (who has cyclothymia, a milder and more chronic form of bipolar disorder), Mariah Carey, Jaco Pastorius, Catherine Zeta-Jones, Jean-Claude Van Damme, Ronald Braunstein, and Patty Duke. Schizophrenia People with schizophrenia live with positive, negative, and cognitive symptoms. Positive symptoms (psychotic behaviors that are not present in healthy people) include hallucinations, delusions, thought and movement disorders. Negative symptoms (abnormal functioning of emotions and behavior) include flat affect, anhedonia, others. Cognitive symptoms include problems with executive functioning, attention, and memory. One artist known for his schizophrenia was the Frenchman Antonin Artaud, founder of the Theatre of Cruelty movement. In Madness and Modernism (1992), clinical psychologist Louis A. Sass noted that many common traits of schizophrenia – especially fragmentation, defiance of authority, and multiple viewpoints – happen to also be defining features of modern art. However, it has been found that those who have it are the most creative either before or after active periods, not during them. Multiple research studies study a link between reduced latent inhibition, and the psychopathology of acute-phase schizophrenia. This is suggestive of a correlation between psychopathology and creativity, but should not be interpreted as a causal relationship. Arguments that support link In a 2002 conversation with Christopher Langan, educational psychologist Arthur Jensen stated that the relationship between creativity and mental disorder "has been well researched and is proven to be a fact", writing that schizothymic characteristics are somewhat more frequent in philosophers, mathematicians, and scientists than in the general population. In a 2015 study, Iceland scientists found that people in creative professions are 25% more likely to have gene variants that increase the risk of bipolar disorder and schizophrenia, with deCODE Genetics co-founder Kári Stefánsson saying, "Often, when people are creating something new, they end up straddling between sanity and insanity. I think these results support the concept of the mad genius." Bipolar disorder Many famous historical figures gifted with creative talents may have been affected by bipolar disorder. Ludwig van Beethoven, Virginia Woolf, Ernest Hemingway, Isaac Newton, Judy Garland, Jaco Pastorius and Robert Schumann are some people whose lives have been researched to discover signs of mood disorder. In many instances, creativity and mania - the overwhelming highs that bipolar individuals often experience - share some common