The study was conducted by four American university researchers, and its findings were reported in an article in the American Psychological Association's Psychological Bulletin, titled “Political Conservatism as Motivated by Social Cognition.” It purports to show psychological links among Ronald Reagan, Adolf Hitler, Benito Mussolini, Rush Limbaugh and other “political conservatives”

The enlightened professors concluded that certain psychological motivations characterize conservatives, including “fear and aggression, dogmatism and intolerance of ambiguity; uncertainty avoidance; need for cognitive closure; and terror management.”

This article comments on Berkeley's study of conservativism. It mentions that Nazis and Fascists were liberal socio-political movements. (I guess these four researchers missed that.) The following is from the article:

Let me give you a few other examples of the liberals' seeming inability to make intellectual distinctions. They seem too narrow-minded to understand that:

perjury, obstruction of justice and contempt of court are different from merely “lying about sex”;

likening Ronald Reagan and Rush Limbaugh to Hitler is the grossest form of hate speech they otherwise pretend to decry;

the desire to reverse liberal judicial activism is not conservative judicial activism;

one can favor action against Iraq without being a “neo-conservative”;

opposition to affirmative action is born of egalitarianism not racism;

advocacy of government-forced wealth redistribution is not synonymous with compassion, and opposition to it is not incompatible with compassion;

their championship of tolerance as the highest virtue is inconsistent with their intolerance toward conservatives, particularly Christian conservatives;

opposition to federal control over education is neither anti-children nor anti-education, but precisely the opposite;

the tax code can affect economic behavior such that marginal tax rate cuts do not result in dollar-for-dollar losses in revenue;

the terrorist threat of suitcase nuclear bombs does not obviate strategic missile defense (SDI) ? we continue to face multiple threats;

developing SDI is not an offensive gesture, but defensive, and should not be deceptively dubbed “Star Wars”;

America can attack Iraq without attacking all other despotic regimes in the world and not be guilty of inconsistency in its approach to foreign policy;

school choice will liberate and uplift minorities;

irresponsible gun control measures will cost, not save lives;

promoting “separation of church and state” often stifles rather than promotes religious freedom