Comments on the Orthogonality of Extraversion and Neuroticism Scales of the Eysenck Personality Inventory

Abstract

Using figures presented by the Eysencks, very small correlations between extraversion and neuroticism scales of the Eysenck Personality Inventory were statistically significant for Forms A and B combined and for Form B using large groups. While it is acknowledged that these results may not be of immense practical value, they do support the findings by Behr and Howarth, among others. It is concluded that these scales for the forms mentioned above are minimally correlated and so not completely orthogonal. Whether this reflects error of measurement or other factors cannot be discerned from present data.