The Conclusion Sounds Plausible …
… but I'm still skeptical of the research that purports to show that conservatives have more self control than liberals (original paper here).
In part of the research, the experimenters gave the experimental subjects fabricated data on the effects of a belief in free will. (I have criticized this style of research before.) If the researchers were willing to lie to at least one set of experimental subjects, why should we believe them now?
On the other hand, this appears to back up my theory that conservatives might do better at the Stroop test. I'd like to see this replicated by other researchers … followed by a study of the Asch test. On the gripping hand, by the reasoning in the preceding paragraph, all studies using the Asch test are dubious.