First, I'm a child psychologist myself. I've done lots of testing. And after 40 minutes, EVERY kid is acting goofy! I've never tested a child who sat perfectly still and compliant throughout. In fact, I would be concerned if they did! Usually when you test a child, you take multiple, multiple breaks and testing is split up to occur on several different days. You have no need to worry. This behavior is absolutely normal. Your psychologist's behavior is the one that is not so normal.
"The child psychologist who thought she had all the answers to parenting until she became one herself." www.themommypsychologist.com