Zoey has been struggling with a very difficult problem for many years, and even as a child her parents were very concerned about it. Although she has no problem speaking with others when she is at home or on the telephone, she finds it nearly impossible to "speak up" when she is at school. Her college professors have found it particularly challenging, as she was unable to participate in any assignments that required speaking in front of the class. Further, she could never bring herself to raise her hand and ask a question in any of her classes. Zoey may be suffering from .