PHYS.ORG - Mar 18 - Florida State University researcher Shuyuan Ho is working on a revolutionary online polygraph that could be used for online dating. Her latest study, published in the journal Computers in Human Behavior, detailed the findings of an online game that she created to measure truthful and deceptive communications between two people. The experiments revealed a person could spot lies ~50% of the time, while a machine could identify lies 85%-100% of the time. The game randomly assigned players to play the roles of "The Saint" and "The Sinner." As sinners and saints interacted via computers, researchers in the iSensor Lab captured those conversations and used machine-learning technology to scrutinize patterns of words and writing. The lying sinners were less expressive, but they used more decorative words. They displayed more negative emotions and appeared more anxious when they communicated with truthtellers. Deceivers also took less time to respond and used more words of insight, such as "think" and "know". Researchers also calculated time lags between every sentence, and even parts of a sentence. Those pauses might have been so slight that they would not necessarily be noticeable to a person, but machine-learning technology could spot it.