The Personality Atlas

Four bipolar dichotomies: E/I (energy direction), S/N (information intake), T/F (decision making), J/P (outer world orientation). Produces 16 four-letter codes.

Biz use: Team building, communication workshops. NOT legally defensible for hiring under EEOC guidelines.

Poor test-retest reliability. 50% of people get a different result when retested 4-6 weeks later. Artificial dichotomies - research shows normal distributions, not bimodal. No peer-reviewed evidence linking type to job performance. But: most widely administered assessment on earth (2M+ per year).

Five dimensions: Mind (E/I), Energy (S/N), Nature (T/F), Tactics (J/P), Identity (A/T). Produces 32 type variants.

Biz use: Self-improvement, team communication, self-awareness. The system Mike Merlino uses with his agent fleet.

Built on MBTI framework but adds A/T (Assertive/Turbulent) dimension borrowed from Big Five Neuroticism. Hundreds of millions of tests taken. No independent peer-reviewed validation of their specific instrument. Highly shareable archetype names drive enormous social media adoption.

Four Action Modes on 1-10 scale: Fact Finder (research instinct), Follow Thru (organize instinct), Quick Start (improvise instinct), Implementor (build instinct). Results as MO like 7-3-8-3.

Biz use: Entrepreneurial and executive hiring. Kolbe B (job requirements) vs A (candidate) = powerful fit screening. Popular in agency, creative, and startup environments.

Measures a genuinely different construct (conation - HOW you act) rather than personality. Test-retest reliability reported at 90%+ over two years - notably better than MBTI. Less independent peer-reviewed validation than Big Five. Not vulnerable to the "personality cannot predict performance" critique because it measures action modes, not personality.

Four behavioral styles: D (Dominance - results/control), I (Influence - enthusiasm/recognition), S (Steadiness - stability/cooperation), C (Conscientiousness - quality/accuracy).

Biz use: Sales training (understanding buyer styles), management development, communication coaching. One of the most widely deployed business frameworks.

More behavioral than personality-based, which helps workplace application. Reasonable face validity. Four-quadrant model oversimplifies. No consistent peer-reviewed validity evidence linking DISC to job performance. Fragmented market with multiple competing versions.

Nine motivational types defined by core FEAR and core DESIRE - not behavioral style or cognitive function. Goes deeper than behavior to underlying motivation. Includes wings and three instinctual variants.

Biz use: Coaching and leadership development. Growing use in tech companies. Particularly valued for team dynamics because it addresses motivation and core fears, not just style.

RHETI (Riso-Hudson) has the best published psychometric data of any Enneagram instrument. Some correlations with Big Five have been found. Nine-type model lacks theoretical parsimony. Best used for introspection and coaching. Strong following in executive coaching, spiritual development, and therapy.

Five dimensions (spectrums, not binary): O (Openness to Experience), C (Conscientiousness), E (Extraversion), A (Agreeableness), N (Neuroticism). Each can be broken into 6 sub-facets.

Biz use: Research gold standard. Increasingly used in HR selection. Legally more defensible than MBTI for selection when using validated instruments and proper norm groups.

THE gold standard in academic personality psychology. Cross-cultural replication in 50+ countries. Predictive validity for health, relationship quality, academic achievement, occupational success. Stable over adult lifespan. Conscientiousness is the single most consistent predictor of occupational performance across job types.

34 talent themes organized into 4 domains: Executing, Influencing, Relationship Building, Strategic Thinking. Assessment ranks all 34; most focus on top 5 Signature Themes. 26+ million people assessed.

Biz use: Individual development plans, team composition analysis, leadership coaching. Particularly strong in strengths-based management model organizations. Fortune 500 widely deployed.

Gallup has published substantial validation work showing top 5 strengths correlate with employee engagement and performance - but most studies are internal or Gallup-funded. 34 themes are proprietary and not externally validated as discrete constructs. Better face validity and organizational application than MBTI.

Six vocational personality types in a hexagon: R (Realistic), I (Investigative), A (Artistic), S (Social), E (Enterprising), C (Conventional). Most people have a profile of 2-3 dominant codes.

Biz use: Career counseling, vocational guidance, career mapping. US Department of Labor O*NET assigns Holland Codes to every occupation (900+). Strong fit between person-code and job-code predicts lower turnover.

One of the most empirically studied frameworks in career psychology. Hexagonal structure replicated in many cultures. Predictive validity for occupational membership and job satisfaction is moderate to strong. Used in O*NET (US Department of Labor). Better supported empirically than MBTI or Enneagram.

Four primary behavioral drives: Dominance (exert influence), Extraversion (social interaction), Patience (stability/consistency), Formality (conform to rules/standards). Plus 17 named Reference Profiles.

Biz use: Fortune 500 hiring. Strong in manufacturing, financial services, sales. PI Job Assessment builds a Job Target and compares candidates. Used for selection, onboarding, management coaching, team design.

400+ validation studies on file. Test-retest reliability ~.80. Four-factor model aligns with Big Five research. First behavioral assessment admitted to the British Psychological Society testing system. Legally defensible when used correctly.

Three instruments: HPI (7 bright-side scales for normal performance), HDS (11 dark-side scales for stress-triggered derailment), MVPI (10 values/culture-fit scales). Together they predict performance, derailment, AND culture fit.

Biz use: Executive selection for large organizations. Succession planning, leadership development, executive coaching. Standard in finance, aviation, nuclear, government. Requires certified Hogan practitioner to interpret.

Most extensive validity database in applied personality assessment (250+ published studies). Test-retest reliability .70-.90. Predictive validity coefficients .30-.40 range. Based on socioanalytic theory rooted in Big Five. HDS "dark side" is the ONLY validated instrument that predicts executive derailment. Gold standard for executive assessment.

TKI: 5 conflict modes (Competing, Collaborating, Compromising, Avoiding, Accommodating). Belbin: 9 team roles. HEXACO: Big Five + Honesty-Humility 6th factor.

Biz use: TKI: team friction, negotiation training. Belbin: team design, project staffing, gap analysis. HEXACO: growing adoption in executive selection where integrity is critical.

TKI: Gold standard for conflict-handling measurement. Belbin: Moderate validity; high practical value for team composition. HEXACO: Strong in research; HH (Honesty-Humility) scale predicts white-collar crime and corruption better than any Big Five measure.