Professionals typically use verbal, nonverbal or physiological lie detection tools (Vrij, 2008). There are several drawbacks associated with such tools. First, many tools are complicated to use and it can take several months to train someone properly in their use (Vrij, 2008). Second, the actual application of such tools can be time consuming. For example, speech analyses are typically carried out on transcripts of verbal statements (Masip, Sporer, Garrido, & Herrero, 2005; Vrij, 2005), and in physiological lie detection, examinees are attached to a polygraph (Raskin & Honts, 2002), undergo electroencephalograms (EEGs, Rosenfeld, 2002) or undergo functional magnetic resonance imaging (fMRI) brain scanning (Spence, Farrow, Herford, Wilkinson, Zheng, & Woodruff, 2001). Third, some of the tools are expensive, both in terms of equipment (e.g. fRMI bran scanner) and in their use (recording EEGs and fMRIs). Analysing someone’s behaviour is perhaps the least complicated way to detect lies but accuracy rates based on such veracity judgements tend to be low (Bond & DePaulo, 2006; Vrij, 2008; Vrij, Mann, Fisher, & Kristen, 2007).