I doubt they tested each of the attributes separately, but rather assumed the clustering of them. I've never met a conservative who was a blind follower of authority either! Or... it could be that since many conservatives are religious, they think that our desire to follow God and clergy/theologians manifests itself to everything in life.
Being Catholic, I place a high value on what comes from the Church in terms of faith and morals, and certain teachings. But that doesn't mean I don't sift through everything carefully because at the end of the day, I'm responsible before God.
Liberals research ways to make their lies more palatable.