Openness to experience is one of the five broad personality traits in the most widely used model of human personality, and it captures something distinctive: the degree to which a person is drawn to novelty, imagination, aesthetic sensitivity, intellectual curiosity, and unconventional ideas. Of all five traits, it is arguably the most misunderstood, partly because it bundles together things that seem unrelated on the surface, like a love of poetry and an appetite for abstract problem-solving. The research on openness has grown considerably over the past two decades, revealing connections to dopamine systems, creative achievement, political attitudes, cognitive aging, and even the possibility of changing the trait with psychedelic compounds.
Two Traits Hiding Inside One
One of the most useful findings in personality research is that openness to experience is not a single, unified thing. It breaks into two distinguishable aspects that researchers call Openness (in the narrow sense) and Intellect. The Openness aspect captures engagement with beauty, fantasy, feelings, and sensory experience. The Intellect aspect captures the drive to engage with abstract ideas, solve complex problems, and seek out intellectual challenges. These two aspects correlate with each other, but they predict different outcomes.
In studies using the Big Five Aspect Scales, the Intellect aspect predicted fluid intelligence (the ability to reason through novel problems) but not creativity, while the Openness aspect predicted creativity but not fluid intelligence.1Personality and Individual Differences. Are Openness and Intellect distinct aspects of Openness to Experience? A test of the O/I model Separately, Intellect was linked to general intelligence and both verbal and nonverbal ability, while Openness in the narrow sense was tied only to verbal intelligence.2PubMed. Openness to experience, intellect, and cognitive ability This distinction matters in practice. Someone who scores high on the Openness aspect but average on Intellect might gravitate toward the arts, while someone with the reverse profile might pursue engineering or analytic philosophy. The broad trait label lumps them together, but their brains and their lives often diverge.
The Dopamine Connection
When researchers look for a biological substrate for openness, the trail leads to dopamine, the neurotransmitter most associated with reward, motivation, and exploration. The theory is straightforward: dopamine drives the urge to explore the environment, seek novel stimulation, and find reward in new information. People higher in openness appear to have dopaminergic systems that respond differently to novelty.
Genetic evidence supports this link. Variation in two genes involved in prefrontal dopamine function, COMT and DRD4, has been associated with individual differences in openness/intellect across multiple samples.3Journal of Research in Personality. Sources of cognitive exploration: Genetic variation in the prefrontal dopamine system predicts Openness/Intellect And at the behavioral level, the effect of a dopamine-modifying drug (sulpiride) on divergent thinking varied depending on a person’s trait openness, consistent with the idea that baseline dopamine differences shape how open someone is to begin with.4PubMed Central. Openness to experience predicts dopamine effects on divergent thinking
Another piece of the puzzle comes from research on latent inhibition, a filtering mechanism that helps the brain ignore stimuli previously tagged as irrelevant. People high in openness show reduced latent inhibition, meaning their brains are less likely to screen out information that was once considered unimportant.5Personality and Individual Differences. Openness and extraversion are associated with reduced latent inhibition: replication and commentary This wider perceptual net could explain why highly open people notice patterns others miss, and also why the trait shows some statistical overlap with unusual perceptual experiences at the far end of the distribution.
Genetics and How Much of It You’re Born With
Twin and adoption studies consistently find that openness has a substantial heritable component. An adoption and twin study found that genetic influence on openness was considerable, while the shared family environment (the household you grew up in) contributed little.6PubMed. Genetic and environmental effects on openness to experience, agreeableness, and conscientiousness: an adoption/twin study Heritability estimates for the Big Five traits generally fall in a range where roughly half the variation is genetic, and openness is no exception. What is less intuitive is that the non-genetic portion comes almost entirely from experiences unique to the individual, not from the family environment both siblings shared. In other words, growing up in the same household with the same books and the same conversations does not make siblings similarly open or closed to experience.
A twin study looking at the overlap between personality and intelligence found a phenotypic correlation of about 0.32 between openness and IQ, and genetic factors accounted for nearly all of the shared variance between them, with genetic correlations in the range of 0.3 to 0.4.7Personality and Individual Differences. The five factor model of personality and intelligence: A twin study on the relationship between the two constructs This means the genes that make someone more open to experience partly overlap with the genes that support higher cognitive ability, though the two are by no means the same thing.
Creativity in the Arts and Sciences
Openness is the personality trait most reliably linked to creative achievement. A meta-analysis of personality in creative people found that the largest effect sizes among personality traits were for openness, along with lower conscientiousness, greater self-acceptance, and higher impulsivity.8PubMed. A meta-analysis of personality in scientific and artistic creativity But the two-aspect distinction described earlier sharpens the picture considerably. When researchers separated the Openness and Intellect aspects, they found that Openness (the aesthetic, imaginative side) predicted creative achievement in the arts but not the sciences, while Intellect predicted creative achievement in the sciences but not the arts.9PubMed Central. Openness to Experience and Intellect differentially predict creative achievement in the arts and sciences
This is a genuinely useful finding if you’re trying to understand why certain people produce creative work. The artist and the scientist may both score high on the broad openness trait, but the underlying flavor of their curiosity differs. The artist is driven by aesthetic sensitivity and fantasy; the scientist, by the pleasure of solving hard problems. Lumping them together under a single trait label misses the action.
Knowledge Accumulation and Cognitive Aging
The link between openness and intelligence is not primarily about raw processing speed or executive control. Openness correlates most strongly with verbal and crystallized intelligence, the kind of broad knowledge you accumulate over a lifetime through reading, conversation, and curiosity. In one neuropsychological study, the correlation between openness and crystallized intelligence was 0.44, substantially larger than its correlations with executive functioning or fluency. That association actually grew stronger with age: among older adults, the partial correlation reached 0.53, compared with 0.26 in younger adults.10PubMed Central. A Neuropsychological Study of Personality: Trait Openness in Relation to Intelligence, Fluency, and Executive Functioning
This pattern makes intuitive sense. A person who is more open spends more time reading, exploring new ideas, and seeking out unfamiliar information. Over decades, that adds up to a broader store of knowledge, which is exactly what crystallized intelligence measures. Research on brain imaging in older adults has found that openness may function as a protective factor in cognitive aging, associated with better preservation of the brain’s memory network.11PubMed Central. Openness to Experience is associated with neural and performance measures of memory in older adults This does not mean openness prevents dementia, but it suggests that the lifelong habits of mind associated with the trait may build cognitive reserve.
How Openness Changes Over a Lifetime
Personality traits are not fixed, and openness follows a distinctive trajectory. Cross-sectional data from large national samples in Britain and Germany show that openness tends to be highest in younger adults and declines fairly steadily with age, with the youngest groups scoring highest and the oldest scoring lowest.12PubMed Central. Age Differences in the Big Five Across the Life Span: Evidence from Two National Samples The decline is not dramatic year to year, but it is consistent enough to be considered one of the most reliable patterns in personality aging research.
In late life, the decline accelerates. A study tracking openness in older adults in relation to mortality found that openness decreased linearly after age 65, and the rate of decline picked up as death approached, following a pattern researchers describe as terminal decline.13PubMed Central. Openness Declines in Advance of Death in Late Adulthood Whether this reflects neurological changes, reduced opportunities for novelty, or some combination is still an open question. But the direction is clear: people generally become less open as they age, and the shift accelerates at the end of life.
Political and Social Attitudes
Few personality-politics connections are as robust as the link between openness and liberal political orientation. In one large study, moving a person from the 20th percentile of openness to the 80th percentile (holding everything else constant) increased the likelihood of that person identifying as “very liberal” by roughly 71%.14PubMed Central. Personality, Childhood Experience, and Political Ideology A separate study looking at the simple correlation between openness and political orientation found the strongest effect among all Big Five traits, with more open individuals leaning further to the left.15Personality and Individual Differences. Personality and political orientation
The interpretation is that open individuals are more comfortable with ambiguity, change, and unfamiliar social groups, which aligns with progressive policy preferences. Conversely, conscientiousness (the trait most associated with order, tradition, and rule-following) tends to predict conservative ideology. These findings do not mean personality determines politics; income, education, geography, religion, and life experience all play roles. But when personality researchers want to predict where someone falls on the political spectrum using only personality scores, openness is their best single variable.
Openness at Work
The relationship between openness and job performance is more nuanced than you might expect. Unlike conscientiousness, which reliably predicts better performance across virtually all occupations, openness does not consistently predict how well someone will do when they first start a job. However, a longitudinal study of job performance trajectories found that employees higher in openness maintained their performance levels longer. While everyone’s performance eventually plateaus and starts to decline, highly open workers decelerated at a slower rate and began declining later than their less open peers.16Applied Psychology. Openness to Experience as a Predictor of Job Performance Trajectories The explanation likely involves adaptability: open individuals may be quicker to absorb new methods, adjust to shifting demands, and find renewed interest in evolving tasks.
Openness also predicts upward job mobility. A study of career trajectories found that a one-unit increase in openness was associated with a 39% higher likelihood of moving into managerial or professional positions. And the relationship ran in both directions: people who were promoted into those roles subsequently scored higher in openness than those who were not, suggesting that the experience of holding a more complex job can itself nudge the trait upward.17PubMed Central. Openness to Experience as a Predictor and Outcome of Upward Job Changes into Managerial and Professional Positions
Relationships and Emotional Sensitivity
In romantic relationships, openness has a modest positive role. A longitudinal study of married couples found that higher openness at baseline was associated with higher marital satisfaction at the same time point, though changes in openness over time did not predict changes in satisfaction.18PubMed Central. Big Five personality domains and relationship satisfaction: Direct effects and correlated change over time Open partners may bring more curiosity and willingness to try new things into a relationship, though the research suggests this effect is less powerful than, say, the well-documented role of neuroticism in predicting relationship conflict.
Highly open people also experience aesthetic and emotional stimuli more intensely. One expression of this is frisson, the chills or goosebumps people sometimes get from music. The frequency of experiencing frisson is positively correlated with openness and with five of its six subfacets, including fantasy, aesthetics, feelings, ideas, and values.19Psychology of Music. Getting aesthetic chills from music: The connection between openness to experience and frisson If you regularly get chills from a piece of music or a striking landscape, you are likely high in openness. It is not that others do not enjoy music; they simply tend to experience it with less visceral intensity.
Can You Become More Open?
Personality traits are relatively stable, but not immovable. The most striking evidence for deliberately shifting openness comes from research on psilocybin, the active compound in psychedelic mushrooms. In a controlled study at Johns Hopkins, participants who had a “complete mystical experience” under psilocybin showed significant increases in openness that persisted more than a year after the session.20PubMed Central. Mystical Experiences Occasioned by the Hallucinogen Psilocybin Lead to Increases in the Personality Domain of Openness Participants who did not have that depth of experience showed no change. The magnitude of the shift was notable because personality traits in adulthood typically change only gradually, if at all.
Subsequent studies have replicated this finding. In a study of psilocybin therapy for treatment-resistant depression, openness increased significantly from baseline to three months after treatment, alongside decreases in neuroticism and increases in extraversion.21PubMed Central. Effects of psilocybin therapy on personality structure A separate study confirmed long-term increases in openness alongside increases in mindfulness, and linked these changes to altered serotonin receptor binding in the cortex.22PubMed. A single psilocybin dose is associated with long-term increased mindfulness, preceded by a proportional change in neocortical 5-HT2A receptor binding The fact that openness, a trait with substantial genetic underpinning, can shift measurably from a single pharmacological experience has been one of the more surprising findings in recent personality research.
The psilocybin findings also raise an interesting question about the dopamine story. While the trait’s baseline levels seem linked to dopamine, the acute drug mechanism of psilocybin primarily involves serotonin receptors. This suggests that multiple neurotransmitter systems contribute to the trait, and that shifting one system can have downstream effects on the others. The science here is still being worked out.
Cross-Cultural Patterns
Openness shows meaningful variation across world regions. A large cross-cultural study found that people in European and American cultures scored higher on both extraversion and openness compared with those in Asian and African cultures.23Journal of Cross-Cultural Psychology. Toward a Geography of Personality Traits A separate analysis found that people from South America and East Asia were significantly different in openness from those in other world regions.24Journal of Cross-Cultural Psychology. The Geographic Distribution of Big Five Personality Traits
These differences are real in the data, but interpreting them is tricky. Self-report personality questionnaires carry cultural baggage: what counts as “enjoying new experiences” or “being interested in abstract ideas” varies depending on what is normative in a given society. Someone in a collectivist culture might express intellectual curiosity differently than someone in an individualist one, without being any less curious in a meaningful sense. Researchers have debated whether these geographic patterns reflect genuine personality differences, measurement artifacts, or some mix of both. The honest answer is that we do not have a clean way to separate the signal from the noise in cross-cultural personality comparisons.
Openness in Other Animals
If openness were purely a human cultural construct, you would not expect to find it in other species. But personality research in animals has identified dimensions that look like openness in several primate species. A review of cross-species personality structure found that extraversion, neuroticism, and agreeableness showed the strongest generality across species, with openness appearing in some but not all non-human animals. A distinct conscientiousness dimension emerged only in chimpanzees, our closest living relatives.25Current Directions in Psychological Science. Personality Dimensions in Nonhuman Animals
In non-human primates, what researchers code as openness looks like curiosity toward novel objects, willingness to explore unfamiliar environments, and playfulness that persists into adulthood. These behaviors vary reliably between individuals and remain fairly stable over time, just as the trait does in humans. The cross-species evidence strengthens the case that openness reflects something biologically real, rooted in neural systems that predate human culture by millions of years, rather than a quirk of how we happen to fill out personality questionnaires.
The Psychopathology Edge
The reduced latent inhibition and wider perceptual net that accompany high openness have a flip side. Research has found that openness per se has only a weak association with psychoticism and schizotypal symptoms. But when the trait is broken into its narrower facets, some facets show much stronger associations, and sometimes in opposite directions. The aesthetic and fantasy components of openness share some variance with unusual perceptual experiences, while the intellectual components do not.26Journal of Personality Disorders. Openness to experience, intellect, schizotypal personality disorder, and psychoticism: resolving the controversy This has been a source of confusion in the literature, because studies that treat openness as a single score tend to find little connection to psychopathology, while studies that decompose it find pockets of meaningful overlap.
The practical implication is not that being imaginative puts you at risk for a psychotic disorder. The overlap exists at the statistical level and is driven by specific subfacets, not by the broad trait. But it does help explain why some clinicians have historically been suspicious of high openness as a clinical signal, and why that suspicion is mostly unwarranted when the trait is measured carefully. The vast majority of highly open people are not experiencing anything clinically concerning; they are simply more permeable to sensory input and more comfortable with ambiguity than average.
Digital Footprints and Predicting Openness
One of the more recent developments in personality science is the ability to infer personality traits from digital behavior. A meta-analysis of studies predicting the Big Five from social media footprints found that prediction accuracy was fairly consistent across all five traits, with correlations ranging from about 0.29 for agreeableness to about 0.40 for extraversion. Openness fell within that range. Accuracy improved when models combined multiple types of digital signals, like language patterns, “likes,” and demographic information.
The accuracy of these models is roughly comparable to the level at which a person’s actual behavior, as observed in everyday life, predicts their self-reported personality. That ceiling has held since well before social media existed, and it reflects a genuine limit on how much behavior of any kind (online or offline) can tell you about someone’s inner personality. The digital prediction work confirms that openness leaks into what you post, read, and engage with online, but it also confirms that personality is only partially visible from the outside, no matter how much data you have.