We are biased in many different areas, and cognitive is one area that gets many interests in psychology.
Try to think of yourself… ups, don’t!
Stop now! You’ll be biased. Definitely.
The better idea is to look at someone else, who thinks that he or she is better at particular skills that he or she actually is.
The point is : none of us can tell precisely how good ourselves in any particular area. None. We are all biased. We all have a common delusion called the Dunning-Kruger effect, named after David Dunning and Justin Kruger, two psychologists who found the phenomenon (source).
What is more interesting is the fact that the most incompetent person, in any particular area, is the one who is most biased; who thinks that his or her skill is expert-like.
For a more interesting presentation of this effect, please watch the following video from TED-Ed:
So, the next time you’re standing in front of mirror, realize that you are not the best evaluator of your skills. It is others. 🙂