The Eysenck Personality Questionnaire (EPQ) is a widely used personality assessment tool developed by Hans J. Eysenck and Sybil B.G. Eysenck. It is designed to measure and quantify an individual’s personality traits based on the Eysenck Personality Theory. The EPQ utilizes a self-report questionnaire format that consists of various scales and subscales to assess the dimensions of extraversion-introversion, neuroticism-stability, psychoticism-socialization, and lie detection.

• Extraversion-Introversion: This subscale measures an individual’s level of sociability, assertiveness, and outgoing behavior. It assesses whether someone tends to be more extroverted (outward-oriented) or introverted (inward-oriented).
• Neuroticism-Stability: The neuroticism-stability subscale evaluates an individual’s emotional stability, moodiness, and tendency to experience anxiety or distress. It distinguishes between individuals who are more emotionally stable and those who are prone to neurotic behaviors.
• Psychoticism-Socialization: This subscale focuses on an individual’s degree of impulse control, independence, tough-mindedness, and anti-social tendencies. It helps identify individuals who possess traits associated with psychopathy, aggressiveness, and non-conformity.
• Lie Detection: The lie detection subscale is specifically aimed at identifying the tendency of an individual to under-report or provide socially desirable responses. It assists in determining the reliability and validity of the individual’s responses throughout the questionnaire.

The EPQ has been utilized across various fields, including psychology, personality research, clinical diagnosis, and employment assessment. It provides valuable insights into an individual’s personality traits and can aid in understanding behavior patterns, predicting responses to certain situations, and guiding appropriate interventions or selection processes.