Curtis, E.T., Huebner, M.G. and LeFevre, J.-A. 2016. The Relationship Between Problem Size and Fixation Patterns During Addition, Subtraction, Multiplication, and Division. Journal of Numerical Cognition. 2, 2 (Aug. 2016), 91-115. DOI:https://doi.org/10.5964/jnc.v2i2.17.