They ask you questions about how you spend your day. For an anxiety disorder, you may be asked questions that seem innocuous, but are loaded with information for the judge. For example, do you have friends, do you visit them, do you go out to dinner, do you watch movies, read books, take the bus, go shopping, go to church, have hobbies, drive, have an email address?
The answers to all of these questions provide information about the level of anxiety a person experiences, and the degree to which it reduces the available job base. They answer such underlying questions regarding how much you can be around crowds, find your own way, concentrate and pay attention, and participate in community and family events.
The more you can do these things, the less disabling your anxiety appears.