“Approximate number system” training: A perceptual learning approach

Hubbard, PhD, E. M. “Approximate Number system” Training: A Perceptual Learning Approach.
Cochrane, A., Cui, L., Hubbard, E. M., & Green, C. S. (2019). “Approximate number system” training: A perceptual learning approach. Attention, perception & psychophysics, 81(3), 621–636. https://doi.org/10.3758/s13414-018-01636-w