While ginger has always thought of herself as the best dancer in the world, she has just begun to notice that some of the other kids in her class are better dancers than she. this realization indicates that ginger has begun to engage in:

  Social comparison

Explanation:  According to the theory of social comparison, given by psychologist Leon Festinger, it is a process of self-evaluation by comparing our abilities and skills with others. It is also a process of self-realisation in terms of our beliefs, aspirations, attitudes, and not just skills. In this way we acquire a far more realistic and accurate picture of ourselves, as well as determine our own personal and social value. Social comparison can also be an impetus for further advancement and self-development when we see how much others are better than us in a field, so it can also be a source of motivation and impetus.

Children can create an incorrect, unrealistic picture of themselves for understandable reasons, as in this case, without seeing the rest of the kids in the class and their dancing skills. Adults can also have misconceptions about their skills and beliefs, say for different reasons and circumstances, but in people there is a tendency to measure themselves with others. This means a tendency to evaluate themselves, their skills and beliefs as accurately as possible, the tendency towards accurate self-evaluation.