This book is a comprehensive review of competitive anxiety research that has used the Sport Competition Anxiety Test, or SCAT (a trait scale), and the Competitive State Anxiety Inventory-2 (CSAI-2). The book describes the theoretical basis and development procedures for both scales, including detailed information on reliability and validity. In both cases a separate section is given over to a literature review followed by considerations of the current status and future directions of the scale. The book concludes with a theory of competitive anxiety based on an interaction between uncertainty about the outcome and the importance assigned to that outcome. (JD)