479 Smith, Smoll, and Grossbard are with the Department of Psychology, University of Washington, Seattle, Washington 98195-1525, and Cumming is now with the School for Health, University of Bath, Bath, England, BA2 7AY. Journal of Sport & Exercise Psychology, 2006, 28, 479-501 © 2006 Human Kinetics, Inc. Measurement of Multidimensional Sport Performance Anxiety in Children and Adults: The Sport Anxiety Scale-2 Ronald E. Smith, Frank L. Smoll, Sean P. Cumming, and Joel R. Grossbard University of Washington This article describes the development and validation of the Sport Anxiety Scale-2 (SAS-2), a multidimensional measure of cognitive and somatic trait anxiety in sport performance settings. Scale development was stimulated by findings that the 3-factor structure of the original Sport Anxiety Scale (SAS; Smith, Smoll, & Schutz, 1990) could not be reproduced in child samples and that several items on the scale produced conflicting factor loadings in adult samples. Alternative items having readability levels of grade 4 or below were therefore written to create a new version suitable for both children and adults. Exploratory and confirmatory factor analyses replicated the original SAS factor structure at all age levels, yielding separate 5-item subscales Somatic Anxiety, Worry, and Concentration Disruption in samples as young as 9 to 10 years of age. The SAS-2 has stronger factorial validity than the original scale did, and construct validity research indicates that scores relate to other psychological measures as expected. The scale reliably pre- dicts precompetition state anxiety scores and proved sensitive to anxiety-reduction interventions directed at youth sport coaches and parents. Key Words: sport anxiety measurement, reliability, factorial and construct validity The study of anxiety, its antecedents, its relations with other psychological variables, and its consequences has a long history of theoretical and empirical attention within sport psychology. Cognition and arousal are widely considered to be different components of the anxiety response, and a distinction has long been made between cognitive and somatic anxiety (Burton, 1998; Davidson & Schwartz, 1976; Deffenbacher, 1977; Smith, Smoll, & Wiechman, 1998). Moreover, although they interact with one another, cognitive and somatic anxiety can at times be elicited by different antecedents (Burton, 1998; Morris & Engle, 1981; Morris & Liebert, 1973), and they can be differentially related to performance, depending