The work is based on an index of "authoritarianism" as measured by accurate assessments on what is known as the Right Wing Authoritarian (RWA) Scale.
Incidentally, you can take this online here. Be interesting to know certain posters scores if they have the balls to take it. My score is 40 - high scores such as those of Republicans, Fundamentalists, Neo-Nazis and Tea Party Supporters can cluster in the 160 - 180 ranges.
Based on these scores certain tendencies are observed:
High RWAs are more submissive to government authority and indifferent to human rights.
They also tend to be more hostile and more highly punitive toward criminals, and more racially and ethnically prejudicedand religious!to boot.
In the United States Republicans cluster at the high end of the RWA Scale whereas Democrats range across the scale.
Make many incorrect inferences from evidence.
Hold contradictory ideas leading them to 'speak out of both sides of their mouths.'
Uncritically accept that many problems are 'our most serious problem.'
Uncritically accept insufficient evidence that supports their beliefs.
Uncritically trust people who tell them what they want to hear.
Use many double standards in their thinking and judgements.
It also appears from the research that there may be no such thing as a Left-Wing equivalent of these RWAs.
In fact, Altemeyer finds that low RWAs are "fair-minded, even-handed, tolerant, nonaggressive persons...They score low on my prejudice scale. They are not self-righteous; they do not feel superior to persons with opposing opinions."