Sure, we think we know how to pick up on whether or not someone is a liar but are we as capable as we assume? Could you pick a liar out of a crowd of strangers?
Well, according to a more recent paper from researchers at the University of Rochester whether we want them to happen or not our facial movements and cues really do give us away. This team used machine learning technology, automated facial feature analysis software and so much more to really identify these differences. They came up with a very promising way to tell whether or not someone is telling the truth.
Using volunteers that split participants into two groups. This being about 151 couples and tons of expressions to analyze before moving forward. From this point, they gave one person the job of asking a series of questions and the other to answer these questions. Some of these people were told to lie about their answers and the rest were told to tell the truth.
“Communication, and especially communication through facial expressions, is a very context-dependent phenomenon. It is likely that findings with one set of communicators following a particular protocol might not hold with another group or a different protocol. We have demonstrated a methodological framework for automatically identifying a set of smile types through unsupervised learning and applied this framework to a corpus of dyadic communication. We showed that in this corpus, the only smile related AUs which cluster well are AU6 and AU12, largely vindicating the past historical research focus on these two AUs. This framework can be readily applied to other face corpora as differing contexts become available. Additionally, the value of developing an encoder based upon this framework was demonstrated by identifying differences between honest and dishonest communication which were not apparent when using raw AUs alone. Additionally, the methodology described in this paper can be easily extended to search the space of AUs other than just those associated with smile.”
While these findings won’t help you get one over on those around you they do help bring some insight into things we were not necessarily aware of. Basically, the most indicative smile a liar would have is the Duchenne smile. This being when both sets of mouth muscles and eye muscles contract together. The liar does this without even realizing it because he or she is excited to be lying in the first place.
What do you think, could you spot a liar? Which one is the liar in the video below, which one is trying to deceive you?
(Image Via: University of Rochester)