Setup the scribes and give A the balls and B the bag and separate them by a couple of metres. A throws the balls one at a time and B catches them in the bag. While A throws, they say a word or phrase that they associate with extroverts or extroversion. As B catches they say a word or phrase that they associate with introverts or introversion. After all the balls have been thrown, reverse the situation.
B offers an extrovert stereotype as they throw to A, who offers an introvert stereotype.
It's important to ask B to reach into the bag and take the balls out one at a time. Once you have the 6 generalizations ask the group if they have any more. Thank participants, collect materials and allow them to return to their seats. The first thing to do is address the value laden negative stereotypes. The descriptors in the title are from the first time I tried this activity in a workshop.