focusing on different aspects

There are different aspects to people. Some people are fast at running, while some are not. Some people are good at math, and some aren't. The list goes on. Every person has certain aspects of themselves that they excel in, and certain aspects of themselves that they are pretty bad at. We are encouraged to focus on what we are great at; for example, if someone is amazing at tennis, they would take more classes and might turn professional. For this reason, people, when asked if they are above average, think about what they do in life; usually what they excel in. And thus, they would be above average in the field. That explains why 94% of people think they are above average; it's because they are above average in the field(s) they work in.