González-Forte, Juan Manuel, Ceneida Fernández, and Wim Van Dooren. “Is There a Gap or Congruency Effect? A Cross-Sectional Study in Students’ Fraction Comparison”. Studia Psychologica 62, no. 2 (June 24, 2020): 109–122. Accessed April 25, 2024. https://journals.savba.sk/index.php/studiapsychologica/article/view/48.