970 11th- and 12th-grade US high-school students (or equivalent Ss in Saudi Arabia, Egypt, and Brazil) completed the Test Anxiety Inventory and the Anxiety/Arousability Inventory in their native language. A confirmatory factor analysis yielded the following conclusions: (1) the measures of trait anxiety arousability, test anxiety (worry), and test anxiety (emotionality) demonstrated high reliability, factorial validity, and discriminant validity in each of the samples; (2) as hypothesized, significant positive correlations were found between all 4 measures in each of the samples; (3) analyses of invariance supported the invariance of factor loadings and factor true variances across 3 cultural groups (Egypt, Brazil, and the US). Saudi Arabia was eliminated from the invariance analysis because the sample was all male.