Catching someone elses yawn is no simple coincidence. Researchers have proven that yawns are contagious because of empathy and, now, theyve linked psychopaths to the inability to catch one. Researchers at Baylor University conducted the experiment by giving participants a Psychopathic Personality Inventory-Revised test and then subjected them to a Contagious-Yawn Experiment, resulting in a large portion of the people who displayed coldheartedness on paper also having difficulty catching a yawn. So the next time you meet a blind date, it may be smart to greet them with a yawn. Read more on Psychology Today.