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Eysenck's Theory of Personality — Previous Year Questions

📊 Topic Overview​

MetricValue
Total Questions14 (6.2% of all questions)
Priority🔴 HIGH — Appears in 10 of 14 years
Repeated Appearances10 times
ProbabilityVery High — expect in Section A

🎯 Must-Know Concepts​

  1. Eysenck's hierarchical model of personality (4 levels)
  2. Three super-factors: E (Extraversion-Introversion), N (Neuroticism-Stability), P (Psychoticism)
  3. Neurophysiological basis of E and N
  4. Cortical arousal theory of extraversion
  5. Relationship between traits and types
  6. PEN model and measurement (EPQ)

📝 Master Answer — Section A (450 words / 10 marks)​

Q. Define Personality. Discuss in detail Eysenck's type/trait hierarchy. (10 marks)​

Also: "Elucidate the dimensions of personality as given by Eysenck." (2024-Dec); "Elaborate Eysenck's theory of personality." (2019-Jun)

Introduction

Hans Eysenck (1916–1997), a British psychologist, developed one of the most influential biologically-grounded trait theories of personality. Synthesising factor analysis with experimental psychology and biological research, Eysenck argued that personality is rooted in the nervous system and can be described at multiple hierarchical levels. His theory is notable for being both descriptive (identifying personality dimensions) and explanatory (providing neurophysiological mechanisms).

Eysenck's Hierarchical Model

Eysenck organised personality into four hierarchical levels:

  1. Specific Response Level: Individual, specific behaviours or reactions in a particular situation (e.g., feeling nervous before an exam)
  2. Habitual Response Level: Habitual behaviours that recur in similar situations (e.g., consistently being nervous in evaluative contexts)
  3. Trait Level: Clusters of correlated habitual responses that form recognisable traits (e.g., shyness, low confidence)
  4. Type Level: Broad super-factors formed by clusters of correlated traits (e.g., Introversion as a type encompassing shyness, social withdrawal, preference for solitude)

Three Super-Factor Dimensions (PEN Model)

Through factor analysis of personality questionnaire data, Eysenck identified three major dimensions:

  1. Extraversion–Introversion (E)

    • Extraversion: Sociable, lively, optimistic, sensation-seeking, carefree
    • Introversion: Quiet, reserved, reliable, controlled, pessimistic
    • Neurophysiological basis: Linked to cortical arousal. Introverts have higher baseline cortical arousal (via ascending reticular activating system — ARAS), so they seek stimulation reduction. Extraverts have lower baseline arousal and seek external stimulation to reach optimal level.

  2. Neuroticism–Stability (N)

    • High Neuroticism: Anxious, moody, emotionally labile, easily upset
    • Emotional Stability: Calm, even-tempered, controlled, reliable
    • Neurophysiological basis: Linked to limbic system reactivity (visceral brain). High-N individuals have a more reactive limbic system, making them emotionally volatile and slow to return to baseline after arousal.

  3. Psychoticism (P)

    • High Psychoticism: Aggressive, cold, egocentric, impulsive, antisocial, creative
    • Low Psychoticism: Empathic, cooperative, conventional
    • Linked to testosterone levels and dopaminergic activity. High P is associated with schizophrenia and psychopathy spectrum.

The Eysenck Personality Questionnaire (EPQ)

Eysenck developed the Maudsley Personality Inventory (MPI), the Eysenck Personality Inventory (EPI), and the Eysenck Personality Questionnaire (EPQ) to measure these dimensions. The EPQ includes a Lie scale to detect social desirability responding.

Criminal and Clinical Applications

Eysenck predicted that high E + high N individuals would be more prone to antisocial behaviour, as their nervous systems are harder to condition. His theory linked personality dimensions to differential conditionability and thus to the development of neuroses and personality disorders.

Conclusion

Eysenck's type-trait hierarchy represents a landmark achievement in personality psychology — providing a parsimonious, empirically testable, and biologically grounded account of individual differences. Its integration of factor-analytic methodology with experimental neuroscience established the template for modern biological approaches to personality.

📝 Section B Answer (250 words / 6 marks)​

Q. Explain the concept of Eysenck's Hierarchical Taxonomy. (6 marks)​

Focus on the four-level hierarchy (Specific Response → Habitual Response → Trait → Type) with examples for each level. Then briefly describe the three super-factors (E, N, P) and their neurophysiological basis in 2–3 sentences.

🧠 Memory Aid​

"SHTTP" — Hierarchy levels: Specific → Habitual → Trait → Type → Person
PEN model: Psychoticism, Extraversion, Neuroticism
E biological basis: Low cortical arousal → seeks stimulation → Extrovert
N biological basis: High limbic reactivity → emotional volatility → Neurotic

✅ Self-Assessment​

  1. Draw and label Eysenck's four-level hierarchical model.
  2. What is the neurophysiological basis of Extraversion?
  3. How does Eysenck explain criminal behaviour using his theory?
  4. What is psychoticism and what neurotransmitter is it linked to?
  5. How does the EPQ measure personality?

💡 Exam Tips​

  • The neurophysiological basis of E and N is frequently asked separately (see also: Neurophysiological Basis topic). Know ARAS for E and limbic system for N.
  • Always mention the four levels of the hierarchy with examples — this is what distinguishes a complete answer from a partial one.
  • "Type-trait hierarchy" and "hierarchical taxonomy" refer to the same concept.