<P> Researchers have reported that the JP and the SN scales correlate with one another . One factor - analytic study based on (N = 1291) college - aged students found six different factors instead of the four purported dimensions, thereby raising doubts as to the construct validity of the MBTI . </P> <P> According to Hans Eysenck: "The main dimension in the MBTI is called E-I, or extraversion - introversion; this is mostly a sociability scale, correlating quite well with the MMPI social introversion scale (negatively) and the Eysenck Extraversion scale (positively). Unfortunately, the scale also has a loading on neuroticism, which correlates with the introverted end . Thus introversion correlates roughly (i.e. averaging values for males and females) -. 44 with dominance, -. 24 with aggression, +. 37 with abasement, +. 46 with counselling readiness, -. 52 with self - confidence, -. 36 with personal adjustment, and -. 45 with empathy . The failure of the scale to disentangle Introversion and Neuroticism (there is no scale for neurotic and other psychopathological attributes in the MBTI) is its worst feature, only equalled by the failure to use factor analysis in order to test the arrangement of items in the scale ." </P> <P> The test - retest reliability of the MBTI tends to be low . Large numbers of people (between 39% and 76% of respondents) obtain different type classifications when retaking the indicator after only five weeks . In Fortune Magazine (May 15, 2013), an article titled "Have we all been duped by the Myers - Briggs Test" stated: </P> <Table> <Tr> <Td> "</Td> <Td> The interesting--and somewhat alarming--fact about the MBTI is that, despite its popularity, it has been subject to sustained criticism by professional psychologists for over three decades . One problem is that it displays what statisticians call low "test - retest reliability ." So if you retake the test after only a five - week gap, there's around a 50% chance that you will fall into a different personality category compared to the first time you took the test . <P> A second criticism is that the MBTI mistakenly assumes that personality falls into mutually exclusive categories...The consequence is that the scores of two people labelled "introverted" and "extroverted" may be almost exactly the same, but they could be placed into different categories since they fall on either side of an imaginary dividing line . </P> </Td> <Td>" </Td> </Tr> </Table>

What are the categories of the myers briggs