Estrada E, Caperos JM, Pardo A. Change in the center of the distribution and in the individual scores: Relation with heteroskedastic pre- and post-test distributions. PST [Internet]. 2020 Aug. 30 [cited 2026 Sep. 17];32(Número 3):410-9. Available from: http://156.35.33.188/index.php/PST/article/view/17042