Anxiety disorders are among the most common childhood disorders. Although anxiety is a normal part of life and growing up, for some children this anxiety becomes chronic, relentless, and progressively worse if left untreated. Physical symptoms typically accompany the intense anxiety caused by the disorder, and may include blushing, profuse sweating, trembling, nausea, and difficulty talking. Effective treatments for anxiety disorders are available, and research continues to yield new, improved therapies that can help most people with anxiety disorders to lead productive, fulfilling lives. This study will look at similarities and differences in family processes and child temperament among children with and without symptoms of anxiety disorders. Results from this study may improve future treatment of children with anxiety disorders.