 Character traits: Neurotechnologies have shown some promise in identifying or predicting aspects of personality or character. In an interesting study aimed at determining how well neuroimaging could detect lies, Greene and colleagues gave subjects in the fMRI scanner a prediction task in a game of chance that they could easily cheat on. By using statistical analysis the researchers could identify a group of subjects who clearly cheated and others who did not (Greene and Paxton, 2009). Although they could not determine with neuroimaging on which trials subjects cheated, there were overall differences in brain activation patterns between cheaters and those who played fair and were at chance in their predictions. Moreover, Greene and colleagues repeated this study at several months remove, and found that the character trait of honesty or dishonesty was stable over time: cheaters the first time were likely to cheat (indeed, cheated even more the second time), and honest players remained honest the second time around. Also interesting was the fact that the brain patterns suggested that cheaters had to activate their executive control systems more than noncheaters, not only when they cheated, but also when deciding not to cheat. While the differential activations cannot be linked specifically to the propensity to cheat rather than to the act of cheating, the work suggests that these task-related activation patterns may reflect correlates of trustworthiness.