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General Personality Science

Personality Trait

A relatively stable pattern of thoughts, feelings, and behaviors that distinguishes one person from another. Traits are continuous dimensions (not categories) measured on a spectrum.

A personality trait is a consistent tendency in how a person thinks, feels, and behaves across different situations and over time. Unlike states (temporary moods), traits are enduring patterns that characterize who you are.

Modern personality psychology views traits as continuous dimensions, not categories. You don't "have" or "not have" extraversion — you fall somewhere on a spectrum from very introverted to very extraverted. This is why the Big Five (which measures traits on percentage scales) is considered more scientifically valid than MBTI (which assigns categorical types).

Traits are approximately 40-60% heritable (genetic) and 40-60% shaped by environment and experience. They're relatively stable in adulthood but can change gradually — about 1 standard deviation over a lifetime. Major life events, therapy, and intentional effort can accelerate trait change.

Related Terms

Introversion
A personality preference for lower stimulation environments. Introverts recharge through solitude and deep focus, prefer small groups over large parties, and think before speaking.
Ambivert
A person who falls near the middle of the introversion-extraversion spectrum, displaying both introverted and extroverted behaviors depending on context. Most people (60-70%) are ambiverts.
Dark Triad
Three socially aversive personality traits: Narcissism (grandiosity, entitlement), Machiavellianism (manipulation, cynicism), and Psychopathy (callousness, impulsivity). Present to varying degrees in the general population.
Five Factor Model (FFM)
The scientific framework behind the Big Five personality test. Developed through decades of factor analysis, identifying five broad dimensions that account for most of the variance in human personality.
Highly Sensitive Person (HSP)
A personality trait found in 15-20% of the population, characterized by deeper sensory processing, emotional sensitivity, and heightened responsiveness to stimuli. Identified by Elaine Aron (1996).
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