<Tr> <Th> MeSH </Th> <Td> D002416 </Td> </Tr> <Tr> <Td_colspan="2"> (edit on Wikidata) </Td> </Tr> <P> The Sixteen Personality Factor Questionnaire (16PF), is a self - report personality test developed over several decades of empirical research by Raymond B. Cattell, Maurice Tatsuoka and Herbert Eber . The 16PF provides a measure of normal personality and can also be used by psychologists, and other mental health professionals, as a clinical instrument to help diagnose psychiatric disorders, as well as help with prognosis and therapy planning . The 16PF instrument provides clinicians with a normal - range measurement of anxiety, adjustment, emotional stability and behavioral problems . It can also be used within other areas of psychology, such as career and occupational selection . </P> <P> Beginning in the 1940s, Cattell used several techniques including the new statistical technique of common factor analysis applied to the English - language trait lexicon to elucidate the major underlying dimensions within the normal personality sphere . This method takes as its starting point the matrix of inter-correlations between these variables in an attempt to uncover the underlying source traits of human personality . Cattell found that personality structure was hierarchical, with both primary and secondary stratum level traits . At the primary level, the 16PF measures 16 primary trait constructs, with a version of the Big Five secondary traits at the secondary level . These higher - level factors emerged from factor - analyzing the 16 x 16 intercorrelation matrix for the sixteen primary factors themselves . The 16PF yields scores on primary and second - order "global" traits, thereby allowing a multilevel description of each individual's unique personality profile . A listing of these trait dimensions and their description can be found below . Cattell also found a third - stratum of personality organization that comprised just two overarching factors . </P>

Who developed the sixteen personality factor questionnaire (16 pf) ​