

Experiment 5 examined response choice mechanisms through the manipulation of lie plausibility.

There was a greater lying latency effect when questions involved more than one possible lie response. In Experiments 3 and 4, we compared response times when participants had only one possible lie option to a choice of two or three possible options.

In both experiments we found that there was a greater difference between lying and telling the truth when participants were directed to lie compared to when they chose to lie. A colored square was presented and participants had to name either the true color of the square or lie about it by claiming it was a different color. In Experiments 1 and 2, participants were directed or chose whether to lie or tell the truth. We investigated two processes suggested to increase response times, namely the decision to lie and the construction of a lie response. Telling a lie takes longer than telling the truth but precisely why remains uncertain.
