We all know that Joan Rivers is devoid of any emotion so this proves this study is on point. Check out this report that makes the case for why Joan is such a beeyotch..
via Science Blogs
Botox, which is used by millions of people every year to reduce wrinkles and frown lines on the forehead, works by paralyzing the muscles involved in producing facial expressions. A study due to be published in the journal Psychological Science suggests that by doing so, it impairs the ability to process the emotional content of language, and may diminish the quality of emotional experiences.
David Havas of the University of Wisconsin-Madison and his colleagues have been investigating the relationship between emotion and language. In a study published in 2007, they covertly manipulated facial expressions by asking participants to hold a pen either in their teeth, to simulate smiling, or between their lips, to prevent them from smiling. This was found to affect the time taken to read sentences containing emotional content: reading times for sentences describing pleasant situations were shorter when the participants were smiling than when they were prevented from smiling, and this was reversed when they read sentences describing unpleasant situations. Thus, understanding of the sentences was apparently enhanced when their emotional content matched the participants’ facial expression, and impaired when it did not.