"Polarization is just one of many ways group membership can change an individual. Perhaps the most striking effect of group membership is that it can modify individuals' perceptions of themselves. Unable to separate their personal introspection from the ways they believe other people perceive them, teenagers may have what psychologists call an "imaginary audience," meaning they believe that other people are just as attuned to their appearance and behavior as they are (cue any pimple cream commercial). These perceptions can affect various aspects of their lives. For example, psychologists found that when Asian girls were subtly reminded about their Asian identity, they performed better on math tests. When they were subtly reminded about their gender, however, they performed worse."