Harrison, Avery, Hannah Smith, Taylyn Hulse, and Erin R. Ottmar. “Spacing Out! Manipulating Spatial Features in Mathematical Expressions Affects Performance”. Journal of Numerical Cognition 6, no. 2 (September 9, 2020): Article e5899. Accessed June 2, 2026. https://jnc.psychopen.eu/index.php/jnc/article/view/5899.