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Kennedy T. Hill, Seymour B. Sarason, The Relation of Test Anxiety and Defensiveness to Test and School Performance over the Elementary-School Years: A Further Longitudinal Study, Monographs of the Society for Research in Child Development, Vol. 31, No. 2, The Relation of Test Anxiety and Defensiveness to Test and School Performance over the Elementary-School Years: A Further Longitudinal Study (1966), pp. 1-76
Hill et al. (Sat,) studied this question.