Youtube Videos

These videos on Youtube were both very informational and interesting. The video titled "Why a scared expression brings a survival advantage" describes the differences in facial expressions between fear and disgust. This study done in Toronto proved that if someone is scared, their eye brows will raise, causing their eyes to widen. The eye balls are likely to shift from side to side. The study also shows that if someone is disgusted, their nose will cringe and their eye brows will lower. The video uses a rat as an example. If there was a dead rat in the road, one would squint and wrinkle their nose if they saw a dead rat in the road, but if the rat was alive in one's bedroom, they would open their eyes, nose, and mouth wide. Students from the University of Toronto found research that disgust and fear "not only convey how you are feeling, but also alter your sensory relationship with the world around you". While experiencing fear, one would receive an increased air take, because while being scared it is natural to have a large gasp. These are all signs of how to differentiate disgust from fear.

The next video called, "FBI Agent Explains How to Spot Liars", explains how to tell if someone is lying or not. Bill Brown, a polygraph examiner and ex-FBI agent, interviewed five people and could tell whether they were lying based off of their facial expressions. Brown calls the eyes "the window to the soul because you can see right through them." If someone looks up to the right while answering a question, they are thinking of a story that never happened. This is also known as lying. If they look up to the left, they are trying to recall something that happened in the past. However, it is the opposite if you are a left-handed person. If someone shifts their eyes and then looks at the interviewer, they are lying because they are trying to see if the interview believes their fake story. If the interviewee is sitting comfortably, then they are most likely telling the truth. Liars show signs of rubbing their neck, tapping their fingers, looking at their watch, leaning back in their chair, sitting to the side, keeping their arms crossed, or tightly folding their hands in their lap. They may also put some kind of barrier between them and the person they are telling a lie to. Another way to tell if a person is dishonest is listening to their tone of voice. If they change the way they are talking to you and they change their volume, then that is an indication they are lying. These are all very great ways to act as a human polygraph and decipher whether people are telling lies or not. This shows why being able to read facial expressions or body gestures is very important in today's world.