Results from second Republican debate

Regular readers will know that, especially in a crowded marketplace, politicians try to stand out and attract votes by presenting themselves in the best possible light that they can. This is a form of deception, and carries the word-use signals associated with deception, so it can be measured using some straightforward linguistic analysis.

Generally speaking, the candidate who achieves the highest level of this persona deception wins, so candidates try as hard as they can. There are, however, a number of countervailing forces. First, different candidates have quite different levels of ability to put on this kind of persona (Bill Clinton excelled at it). Second, it seems to be quite exhausting, so that candidates have trouble maintaining it from day to day. Third, the difficulty depends on the magnitude of the difference between the previous role and the new one that is the target of a campaign: if a vice-president runs for president, he is necessarily lumbered with the persona that’s been on view in the previous job; if not, it’s easier to present a new persona and make it seem compelling (e.g. Obama in 2008). Outsiders therefore have a greater opportunity to re-invent themselves. Fourth, it depends on the content of what is said: a speech that’s about pie in the sky can easily present a new persona, while one that talks about a candidate’s track record cannot, because it drags the previous persona into at least the candidate’s mind.

Some kinds of preparation can help to improve the persona being presented — a good actor has to be able to do this. But politicians aren’t usually actors manqué so the levels of persona deception that they achieve from day to day emerge from their subconscious and so provide fine-grained insights into how they’re perceiving themselves.

The results from the second round of debates are shown in the figure:

deceptdocs

The red and green points represent artificial debate participants who use all of the words of the deception model at high frequency and low frequency respectively.

Most of the candidates fall into the band between these two extremes, with Rand Paul with the lowest level of persona deception (which is what you might expect). The highest levels of deception are Christie and Fiorina, who had obviously prepped extensively and were regarded as having done well; and Jindal, who is roughly at the same level, but via completely different word use.

Comparing these to the results from the first round of debates, there are two obvious changes: Trump has moved from being at the low end of the spectrum to being in the upper-middle; and Carson has moved from having very different language patterns from all of the other candidates to being quite similar to most of them. This suggests that both of them are learning to be better politicians (or being sucked into the political machine, depending on your point of view).

The candidates in the early debate have clustered together on the left hand side of the figure, showing that there was a different dynamic in the two different debates. This is an interesting datum about the strength of verbal mimicry.

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