In our opinion R.Cattell has made the greatest discovery in a psychological science of XX century. The evidence to that is worldwide practical use of the 16PF, allowing to predict variety of the person behavior.

Psychological Basis

From the beginning of 1930th intensive research of the personality psychology on the basis of multifactor methods is developed. In one of these investigations, carried out by Illinois University Professor of psychology Raymond B.Cattell, has been  undertaken attempt of unbiased (not determined by preliminary hypotheses) and as full as possible revealing of the fundamental variables being found in diverse features of the personality, expressed in ordinary language. These deep features received by means of factorial analysis have formed the stable structure and have been named by R.Cattell "primary source personality traits". For quantitative measurement of expressiveness of discovered factors, personality test - the Sixteen Personality Factor Questionnaire (16 PF) has been created, for the first time published in 1949.

Today there is no unequivocal attitude to the findings made by R.Cattell and his colleagues from Institute of Personality and Ability Testing (IPAT). This theory of personality is either considered as a hypothesis needing the further experimental corroboration, or even correctness of baseline conditions and the personality test validity is completely denied. In the book of A.Anastasi "Psychological testing", some kind of testology encyclopedia, the factors revealed by R.Cattell are estimated as more likely reflecting partial influence of social stereotypes and other constant mistakes in judgments, rather than structure of the personality features.

In our model we suppose the existence of fourteen basic personality features corresponding with major 16PF personality test factors, except for factors "O"  and "Q4", considered as derivative.

A list of these 14 bipolar factors from Cattell's Sixteen Personality Factors Model: