Eysenck’s Personality Questionnaire-EPQ
Hans Eysenck’s – on physiology and genetics.
Although he was a behaviourist who considered learned habits of great importance,
he believed that personality differences grow out of our genetic inheritance.
He is, therefore, primarily interested in what is usually called temperament. (an aspect of our personalities i,e genetically based, and present from birth or even before.
In devising a temperament-based theory Eysenck did not exclude the possibility that some aspects of personality are learned, but left the consideration of these to other researchers.
Eysenck’s Personality Questionnaire- Revised
Eysenck developed a model of personality based on traits that he believed were highly heritable and had a likely psycho-physiological foundation.
The three main traits that met this criteria were
I.Extraversion- Introversion (E),
II.Neuroticism- Emotional Stability (N)
}The EPQ had 100 questions (yes/no type). Later it was revised and EPQ-R was introduced which consists of 90 questions. (yes/no type)
}EPQR is a verbal paper pencil test in English.
}It can be administered either individually or in a group.
}Lie scale has been introduced to check whether people fake their answers. 4th dimention.
}Age group : 16 and above.
}There is No time limit.
}Reliability: Test retest reliability for EPQ-R is very high. It ranges from 0.80-0.90.
}Validity: Construct validity has been tested through factor analysis within and across various countries and cultures. (Barrett, Petrides, Eysenck & Eysenck, 1998)
}Standardization and Norms: Score forms are available for 2,312 male and 3,262 female subjects. The raw scores are to be converted into Sten scores.
The use of lie scale helps in reducing social desirability.
The reliability of the scale is high.
For validity the criterion the test uses is extensive. But the test does not give a definite value for the same.
There is no operational definition given for the test.