“…From a psychometric point of view, one would expect more trials to be associated with enhanced reliability (Kleinberg & Verschuere, 2015). At the same time, more trials may lead to adaptation or habituation (Thompson, 2009) and may provide participants with more opportunities to practice their responses (De Paulo et al, 2003;Walczyk et al, 2014) or even to exert countermeasures (i.e., strategies that participants use to appear truthful; see e.g., Ben Shakhar, 2011). Previous findings regarding the effect of practice on the RT deception effect are inconclusive (Johnson, Barnhardt, & Zhu, 2005;Vendemia, Buzan, & Green, 2005 (Ben-Shakhar, 1977;Ben-Shakhar, Lieblich, & Kugelmass, 1982;Hu, Hegeman, Landry, & Rosenfeld, 2012;Lieblich, Kugelmass, & Ben-Shakhar, 1970).…”