Are personality types a statistical mirage? (with Colin DeYoung)

Jan 28, 2026 1h 25m 9 insights Episode Page ↗
Colin G. DeYoung, a professor of psychology at the University of Minnesota, discusses the scientific definition of personality, its stability over the lifespan, and the empirical evidence for the Big Five traits. He also explores the relationship between personality and mental health, advocating for a shift from categorical diagnoses to dimensional spectra.
Actionable Insights

1. Adopt Dimensional Thinking

Shift away from viewing personality and mental health problems as fixed categories (e.g., ‘you have ADHD’) and instead embrace a dimensional perspective, recognizing that traits and symptoms exist on a spectrum. This approach can reduce stigma and provide a more accurate understanding of individual differences, similar to how blood pressure is monitored on a continuum rather than as a binary diagnosis.

2. Psychotherapy Reduces Neuroticism

Engage in psychotherapy if you experience high neuroticism (tendency towards negative emotions and mental health challenges), as studies show it can lead to significant reductions in neuroticism levels. This improvement is not merely about better functioning at the same level, but an actual shift in the underlying trait.

3. Understand Personality Hierarchy

Recognize that personality is best understood as a hierarchy, with broad traits like the Big Five (extroversion, openness, neuroticism, conscientiousness, agreeableness) at the top, breaking down into more specific facets. For greater accuracy in understanding yourself or others, delve into these more fine-grained personality descriptions, as they offer more predictive power than just the broad traits.

4. Acknowledge Personality Trade-offs

Understand that almost all personality traits, including seemingly negative ones like introversion or neuroticism, come with inherent trade-offs. For example, while introverts may experience less joy, they might also make fewer risky decisions, helping to reframe self-perception and foster acceptance of diverse personality profiles.

5. Leverage Key Life Events

Be aware that certain major life events, specifically getting into your first serious romantic relationship and securing your first job, reliably predict positive personality changes. These experiences tend to make individuals more conscientious and agreeable, fostering a more mature personality profile.

6. Consider Individual Responses

When evaluating the impact of life events, remember that people react to the same events in individually different ways (e.g., having kids makes some more conscientious, others less). Avoid generalizing effects across the population and instead focus on how specific events uniquely influence different individuals.

7. Explore Personality Correlations

Utilize resources like personalitymap.io to explore over a million human correlations between various personality traits and behaviors. This can help deepen your understanding of how different aspects of personality relate to each other and to real-world outcomes.

8. Take Gender Continuum Test

Visit clearerthinking.org to take the free ‘gender continuum test’ to learn about the data-driven relationship between gender and personality. This test provides a personalized analysis of your personality based on data from over 15,000 people.

9. Recruit Study Participants Efficiently

For researchers, marketers, and product developers, use Positly.com to recruit high-quality study participants quickly and affordably from over a hundred countries. This platform addresses common pain points in human subject research, enabling better results.