Estrada, Eduardo, José Manuel Caperos, and Antonio Pardo. “Change in the Center of the Distribution and in the Individual Scores: Relation With Heteroskedastic Pre- and Post-Test Distributions”. Psicothema 32, no. Número 3 (August 30, 2020): 410–419. Accessed September 17, 2026. http://156.35.33.188/index.php/PST/article/view/17042.