Extroverts are more responsive to high-intensity and "happy" stimuli, which may be why an extrovert gets frustrated at the less "readable" face of the introvert.
Laurie HelgoeAs an introvert, you can be your own best friend or your worst enemy. The good news is we generally like our own company, a quality that extroverts often envy. We find comfort in solitude and know how to soothe ourselves. Even our willingness to look at ourselves critically is often helpful.But, we can go too far. We can hoard responsibility and overlook the role others play. We can kick ourselves when we're down. How many times have you felt lousy about something, only to get mad at yourself for feeling lousy?
Laurie HelgoeIf the extrovert is trying to "cheer up" the introvert - extroverts are programmed to seek social rewards! - he or she may feel like a failure if the introvert remains unmoved.
Laurie Helgoe