6 annoying speaking habits you have, according to science

Pessimism is a self-fulfilling prophecy: if you expect to be disliked when meeting people, research shows you will probably project cold negativity and prove yourself right. Social optimism, on the other hand, works the same way: people who expect other people to like them will enter into conversation more positively and, often, leave the other person feeling the same way. This doesn’t mean you need to suppress your emotions all day, but consider that happiness and sadness are as contagious as a virus; if you wouldn’t greet a friend by sneezing in her face, don’t greet her with a sour mentality either.