Eysenck Personality Questionnaire is a questionnaire used to analyze the personality traits of a person. It was devised by psychologists Hans Jürgen Eysenck and Sybil B. G. Eysenck. Hans Eysenck was a behaviorist, so he strongly believed in the importance of learned habits. But he also believed a person’s personality is determined by his genetic inheritance. So he developed this Eysenck Personality questionnaire, basically considering the temperament-based theory. The temperament-based theory takes two aspects into consideration: Extroversion-Introversion and Neuroticism-Stability. But he didn’t completely exclude the possibility that some aspects of personality are learned but left considering these to other researchers.
Initially, the EPQ is based on the two biologically-based dimensions of personality, E and N. Still, later, the third dimension of Psychoticism and Socialisation is added by the researchers who took it further. The current EPQ is a 48 item questionnaire, which aims at identifying the personality of an individual.
Every personality test works based on the Five-factor model of personality. Likewise, the EPQ instrument is developed based on three important dimensions, namely,
The EPQ is an instrument with 48 questions basically in its short form; this is the one developed by Hans Eysenck, but when other researchers added more dimensions to it, the EPQ-Revised version is formed, it consists of 100 questions. The short form EPQ is most widely used; these questions are “Yes” or “No” type; unlike other personality tests, it doesn’t use a 5 or 6 points Likert scale. So it is easy to take this personality test. The scores of Extroversion and Neuroticism are calculated individually, and it can reveal how much of an extrovert and neurotic you are.
There are various studies conducted over the internal consistency of the EPQ; the Extroversion and Neuroticism scales are found to be more reliable than the Psychoticism scale. So the scale is more reliable in giving consistent results when measured.
Analyzing your personality and knowing your strengths and weaknesses are always helpful in developing a more refined version of yours. The Eysenck Personality Questionnaire is one of the finest tools to analyze your personality in a more evidence-based scientific approach. It has been widely used by mental health practitioners and researchers to narrow down individuals' personality traits and help them solve personality-related issues.