Among the criticisms of the sociologic theory presented in The Authoritarian Personality (1950) are the validity of the psychoanalytic interpretation of personality; methodological inadequacies of the California F-scale personality test; and bias that authoritarianism exists only in the right wing of the political spectrum. In addition an analysis examining the authoritarian personality approach written by C.G. Sibley and J. Duckitt reported that more recent research has produced two more effective scales of measurement for authoritative personalities. The first scale is called the Right Wing Authoritarianism (RWA) and the second is called the Social Dominance Orientation (SDO). They have proved to be highly reliable in predicting prejudice and other characteristics associated with authoritative personalities. In The Anti-authoritarian Personality (1977) W.P. Kreml found stylistic similarities between authoritarians and anti-authoritarians (dogmatism, rigidity, etc.), and that variable constructs, such as (a) the relative need for order, (b) the relative need for power, (c) the rejection or acceptance of impulse, and (d) extroversion-versus-introversion, differentiated the two types of personality, and could underpin a full-spectrum psycho-political theory.Kreml, William P. The Anti-Authoritarian Personality (1977) Oxford; New York: Pergamon Press..
