Personality Psychology: Stability, Development, Culture, and Biology

Comprehensive vocabulary flashcards covering personality stability, lifespan development, cultural psychology, neuroanatomy, and biological mechanisms.

Rank-Order Consistency

The tendency of individuals to maintain the ways in which they are different from other people who are the same age over time, with test-retest correlations ranging from $r = .60$ to $.90$ over a 10-year span.

Cumulative Continuity Principle

The developmental principle stating that personality traits become increasingly consistent and stable as an individual grows older.

Heterotypic Continuity

The continuity of an underlying personality trait across the lifespan, while the specific behaviors that express that trait change in response to age and prevailing social norms.

Temperament

The innate behavioral and emotional tendencies present in early childhood that form the initial basis of personality, influenced in part by inherited genetics.

Person-Environment Transactions

The ongoing interactions in which individuals respond to, seek out, and actively create environmental situations that are compatible with and magnify their personality traits.

Active Person-Environment Transaction

A process where a person actively seeks out environments compatible with their personality and avoids incompatible ones (e.g., an aggressive person going to bars where fights are frequent; an introvert avoiding social gatherings).

Reactive Person-Environment Transaction

A process where different people respond differently to the exact same situation (e.g., an extravert finding a party enjoyable while an introvert finds the same party unbearable).

Evocative Person-Environment Transaction

A process where an individual's personality leads to behaviors that change the environment or situation they experience (e.g., a conscientious person telling a group 'it\'s time to get to work'; a disagreeable person starting an argument).

Personality Development

The change in the mean level of a personality trait across time at a population level.

Cohort Effects

Differences observed across age groups attributable to having grown up in different historical, physical, or social environments rather than true developmental maturation.

Cross-Sectional Research

A research design assessing individuals of different age groups simultaneously, which reveals age-related increases in Conscientiousness, Openness, and Agreeableness, stability in Extraversion, and decreases in Neuroticism, but remains vulnerable to cohort effects.

Longitudinal Research

A research method involving repeated assessments of the same individuals across time to evaluate within-person development while holding cohort constant, demonstrating increases in social dominance, agreeableness, conscientiousness, and emotional stability.

Maturity Principle

The principle stating that traits needed to effectively fulfill adult roles—specifically Agreeableness, Conscientiousness, emotional stability, and social dominance—tend to increase with age.

Relative Stability

The consistency with which individuals change in comparable ways relative to peers of the same age, explaining how rank-order consistency coexists with population-level mean trait development.

Sociogenomic Trait Intervention Model

A two-step model of intentional personality change requiring individuals to first identify what trait-related behavior they wish to alter, and second, perform actions outside their comfort zone until new habits form and behaviors become automatic.

Preconditions of Trait Change Framework

A theoretical sequence showing that personality change requires changing behaviors to be seen as desirable/necessary (Precondition 1) and feasible (Precondition 2), prompting self-regulated behavioral changes that must become habitual (Precondition 3) to produce lasting trait change.

Obstacles to Personality Change

Four psychological barriers that hinder change: not seeing a reason for change, blaming failures on external forces rather than one's own personality, the effort required, and an innate preference for consistency and predictability.

Cross-Cultural Approaches

Theoretical perspectives assuming culture is independent and discernible from individual personality, focusing on universal trait structures (e.g., the Big Five) and disentangling nature from nurture across societies.

Cultural Approaches

Theoretical perspectives positing that culture and personality are inextricably linked and mutually constitutive, requiring indigenous, inside-out study rather than universal assumptions.

WWEIRD Cultures

An acronym representing Western, White, Educated, Industrialized, Rich, and Democratic societies, which make up less than $12\%$ of the global population but account for $80\%$ of psychology research participants.

HEXACO Model

A six-factor personality taxonomy derived via lexical approaches comprising Honesty-Humility, Emotionality, eXtraversion, Agreeableness, Conscientiousness, and Openness.

Reference-Group Effect

A self-report ($S$ data) bias where individuals evaluate themselves against their immediate local cultural norms and standards, often diminishing observed cross-cultural differences.

Etic

A cross-cultural research perspective that examines behaviors and personality traits from outside the cultural system to identify universally comparable concepts.

Emic

A cultural research perspective that studies behaviors, psychological constructs, and traits from within a specific culture using its own indigenous language and concepts.

Tough and Easy Cultures

A cultural dimension differentiating societies where individuals can pursue a wide variety of goals (easy cultures) versus societies offering few viable goals that are difficult to achieve (tough cultures).

Collectivist Cultures

Societies (e.g., China, India, Mexico) where people view themselves as interdependent members of a collective, prioritizing group needs, saving face, social relationships, and grounding emotions in social worth.

Individualist Cultures

Societies (e.g., Canada, USA, Australia) where people view themselves as independent entities, prioritizing autonomy, prominence, self-esteem, private inner emotional experiences, and behavioral consistency.

Historical Diversity

The number of distinct foreign descendant sources within a culture's history; cross-cultural research across 56 countries shows higher historical diversity is associated with higher national Openness to Experience.

Ethnocentrism

The observational bias wherein a researcher's evaluations, interpretations, and judgments of other cultures are systematically distorted by their own cultural lens and background.

Outgroup Homogeneity Bias

The tendency to view members of an outgroup as being largely uniform or 'all alike,' while perceiving members of one's ingroup as diverse and multifaceted.

Hypothalamus

A brain structure that regulates metabolic functions, controls hormone secretion, and coordinates the fight-or-flight physiological response.

Amygdala

A subcortical limbic structure that processes emotional reactions, threat appraisal, and reward cues; physical damage to this structure leads to a flattening of emotional response.

Nucleus Accumbens

A subcortical brain structure central to the reward and approach system, closely linked to extraversion and dopamine signaling.

Hippocampus

A limbic system structure responsible for memory consolidation and the encoding of emotional memories, structurally associated with neuroticism.

Insula

A cortical structure that supports the assignment of emotional meaning, visceral awareness, and the capacity for empathy; related to agreeableness and neuroticism.

Dorsolateral Prefrontal Cortex

A region within the prefrontal cortex responsible for cognitive control, goal maintenance, reasoning, and emotional regulation, associated with Conscientiousness and Neuroticism.

Lateral Orbitofrontal Cortex

A prefrontal brain region that evaluates and assigns reward values to choices, associated with conscientious decision-making and self-regulation.

Medial Prefrontal Cortex

A frontal region supporting self-referential thought, emotional regulation, and rumination, structurally associated with Neuroticism.

Fronto-Temporal Dementia (FTD)

A neurodegenerative disease predominantly affecting the frontal and temporal lobes that results in profound personality deterioration, including socially inappropriate conduct, diminished empathy, and impaired impulse control.

Computed Tomography (CT Scans)

A neuroimaging technique that generates structural X-ray cross-sectional slices to examine physical brain anatomy.

Positron Emission Tomography (PET)

A neuroimaging method that tracks the location of a radioactive tracer injected into the bloodstream to measure metabolic and neurotransmitter activity.

Functional Magnetic Resonance Imaging (fMRI)

A neuroimaging method that tracks shifts in blood oxygen levels (the BOLD signal) to map functional changes in brain activity across time and locations.

Dopamine

A neurotransmitter that facilitates motor control and the reward approach system; high levels correlate with novelty-seeking, positive affect, exploration, Extraversion, and Openness.

Endorphins

Endogenous opioid neuropeptides involved in pain relief and pleasant affect; sensitivity to endorphin signaling is heightened in individuals high in Extraversion.

Serotonin

A regulatory neurotransmitter that stabilizes mood and behavior; facilitates the metatrait of stability by supporting Agreeableness, Conscientiousness, and emotional stability.

Serotonin Syndrome

A dangerous, potentially fatal physiological condition resulting from toxic serotonin excess, characterized by extreme agitation, tremors, muscle rigidity, and high fever.

Testosterone

A steroid hormone related to dominance, drive, competitiveness, and aggression that shares a bidirectional relationship with social outcomes and behaviors.

Epinephrine and Norepinephrine

Adrenal and central nervous system hormones/neurotransmitters that trigger the acute fight-or-flight response, accelerating heart rate and inhibiting digestion under threat.

Cortisol

A steroid hormone released during threat and stress; chronically high baseline levels reflect heightened stress perception, whereas chronically low levels are associated with sensation seeking.

Neuroticism-to-Health Risk Pathway

The physiological cascade wherein higher Neuroticism precipitates anxiety and depression, resulting in increased stress perception and cortisol release, ultimately producing adverse physical health risks.