information:extraction
Hans Eysenck

Shortly afterward, Hans Eysenck began researching political attitudes in the United Kingdom. He believed that there was something essentially similar about the fascism of the National Socialists (Nazis) on the one hand and the communists on the other, despite their opposite positions on the left–right axis. As Hans Eysenck described in his 1956 book Sense and Nonsense in Psychology, Eysenck compiled a list of political statements found in newspapers and political tracts and asked subjects to rate their agreement or disagreement with each. Submitting this value questionnaire to the same process of factor analysis used by Ferguson, Eysenck drew out two factors, which he named "Radicalism" (R-factor) and "Tender-Mindedness" (T-factor).

Such analysis produces a factor whether or not it corresponds to a real-world phenomenon and so caution must be exercised in its interpretation. While Eysenck's R-factor is easily identified as the classical "left–right" dimension, the T-factor (representing a factor drawn at right angles to the R-factor) is less intuitive, as high-scorers favored pacifism, racial equality, religious education and restrictions on abortion, while low-scorers had attitudes more friendly to militarism, harsh punishment, easier divorce laws and companionate marriage.

According to social scientist Bojan Todosijevic, radicalism was defined as positively viewing evolution theory, strikes, welfare state, mixed marriages, student protests, law reform, women's liberation, United Nations, nudist camps, pop-music, modern art, immigration, abolishing private property, and rejection of patriotism. Conservatism was defined as positively viewing white superiority, birching, death penalty, antisemitism, opposition to nationalization of property, and birth control. Tender-mindedness was defined by moral training, inborn conscience, Bible truth, chastity, self-denial, pacifism, anti-discrimination, being against the death penalty and harsh treatment of criminals. Tough-mindedness was defined by compulsory sterilization, euthanasia, easier divorce laws, racism, antisemitism, compulsory military training, wife swapping, casual living, death penalty, and harsh treatment of criminals.

Despite the difference in methodology, location and theory, the results attained by Eysenck and Ferguson matched. Simply rotating Eysenck's two factors 45 degrees renders the same factors of religionism and humanitarianism identified by Ferguson in America.

Eysenck's dimensions of R and T were found by factor analyses of values in Germany and Sweden, France and Japan.

One interesting result Eysenck noted in his 1956 work was that in the United States and the United Kingdom, most of the political variance was subsumed by the left/right axis, while in France the T-axis was larger and in the Middle East the only dimension to be found was the T-axis: "Among mid-Eastern Arabs it has been found that while the tough-minded/tender-minded dimension is still clearly expressed in the relationships observed between different attitudes, there is nothing that corresponds to the radical - conservative continuum".