I very much agree with the author's take that introvert/extrovert is a stupidly reductionist categorization for human social behavior. I like their approach to looking at different kinds of social interaction, but I think just focusing on group size misses other important differences:<p>* How close or long-term the relationship with the others is. Do you like meeting new people or prefer the company of old friends and family? Do you want to be able to let down your guard and be your true self without worry, or do the higher stakes of the long term consequences stress you out?<p>* How balanced the power is and where you are on it. Do you like rousing a team of minions, give and take with peers, or being inspired to follow a visionary?<p>* How cooperative versus adversarial the relationship is. Do you want to make sacrifices for the greater good so that we all win, or do you want to defeat your opponent? Do you want to give people the benefit of the doubt and show compassion, or protect others from dangerous bad actors?<p>Also, not limited to social interaction, I think many people often fail to distinguish:<p>1. I don't like this thing.<p>2. I feel anxiety about this thing.<p>If social interaction stresses you out but you're always glad after you did it, you're not an introvert, you have social anxiety. If you don't want to go to a social function, but you go anyway and it goes perfectly fine, but then afterwards you still wish you hadn't gone, that's more likely to be actual introversion.<p>I strongly suspect that most self-described introverts (including myself for many years) are actually people with a normal or even high level of extroversion but high social anxiety.