Bipolar Disorder and IQ: The Surprising Connection
Bipolar Disorder is a mood disorder characterized by episodes of mania or hypomania (elevated mood, decreased need for sleep, increased energy and risk-taking) alternating with episodes of depression. It affects approximately 2.4% of the global population and is associated with significant functional impairment. Unlike schizophrenia — where cognitive impairment is a consistent finding — the relationship between bipolar disorder and IQ is more nuanced and, in some respects, surprising. While acute mood episodes produce measurable cognitive impairment, euthymic (mood-stable) individuals with bipolar disorder often show average to above-average cognitive function. Several population-level studies have found that bipolar disorder is overrepresented among highly educated and high-IQ populations — fueling the long-standing cultural association between bipolar disorder and creative genius.
How Bipolar Disorder Affects IQ Test Performance
Cognitive effects in bipolar disorder are highly state-dependent. During manic episodes: accelerated processing speed can produce temporarily elevated performance on some timed tasks, but working memory and executive function are impaired, and judgment is severely compromised. During depressive episodes: processing speed, working memory, executive function, and attention are all impaired, similar to unipolar depression. During euthymia (mood stability): most cognitive deficits remit, though subtle impairments in verbal learning and executive function often persist. Research shows that the number of lifetime mood episodes predicts the degree of residual cognitive impairment — suggesting cumulative illness burden affects the brain over time. Verbal intelligence and crystallized knowledge tend to be well-preserved throughout the illness course.
What the Research Shows
A landmark 2010 study in the British Journal of Psychiatry analyzed Swedish military IQ test data from over 700,000 men and found that those who later developed bipolar disorder had significantly higher childhood IQ scores than the general population, particularly in verbal reasoning. A 2012 study published in PNAS found that genetic variants associated with bipolar disorder and schizophrenia were also associated with superior cognitive performance in the general population — suggesting a genetic 'tradeoff.' Research by Kay Redfield Jamison (herself diagnosed with bipolar disorder) documented dramatically elevated rates of bipolar disorder among award-winning poets and writers, supporting the creativity-bipolar connection. A 2021 meta-analysis in Psychological Medicine confirmed that euthymic bipolar patients show deficits of about 0.4–0.5 standard deviations on processing speed and verbal learning tasks, but performance closer to normal on reasoning measures.
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Frequently Asked Questions
Are people with bipolar disorder smarter than average?
Some large population studies find that bipolar disorder is somewhat more common in individuals with higher premorbid IQ, particularly high verbal IQ. A Swedish study of over 700,000 people found significantly higher childhood IQ scores in those who later developed bipolar disorder. However, this is a population-level statistical association — not every person with bipolar disorder has high IQ, and not every high-IQ person is at risk for bipolar disorder. The finding likely reflects complex genetic overlaps rather than a simple intelligence-bipolar link.
How does bipolar disorder affect cognitive function?
Cognitive effects depend heavily on mood state. During manic episodes, processing speed may be elevated but working memory and judgment are impaired. During depression, processing speed, memory, and executive function are all reduced. In euthymia (mood stability), most people with bipolar disorder perform near the average range, though subtle deficits in verbal learning and executive function often persist. The cognitive impact of bipolar disorder generally worsens with more lifetime mood episodes, making consistent treatment particularly important.
Is there really a link between bipolar disorder and creativity?
The research supports a real, though complex, association. Studies of eminent writers, poets, composers, and artists consistently show higher-than-expected rates of bipolar disorder and related mood conditions. Shared genetic factors between mood disorders and creative achievement have been identified in population genetics studies. However, it's important to distinguish between the hyomanic personality traits (openness, energy, associative thinking) that may enhance creativity and the full disorder, which causes significant suffering and impairment. Bipolar disorder is not necessary for creativity, and creativity does not require bipolar disorder.
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MyIQScores Editorial Team
Researchers in cognitive psychology, psychometrics & educational science
Last updated
May 10, 2026
All content on MyIQScores is reviewed for scientific accuracy against peer-reviewed research in cognitive psychology and psychometrics. Our editorial team cross-references each article with published literature before publication and updates pages whenever new research warrants a revision.