a2 Stanford University School of Education, AAA Lab, Stanford, CA 94305-2055. [email protected]
a3 Program in Neuroscience, Stanford University School of Medicine, Stanford, CA 94305. [email protected]
a4 Symbolic Systems Program, Stanford University, Stanford, CA 94305. [email protected]
We concur with Cohen Kadosh & Walsh (CK&W) that representation of numbers in the parietal cortex is format dependent. In addition, we suggest that all formats do not automatically, and equally, access analog magnitude representation in the intraparietal sulcus (IPS). Understanding how development, learning, and context lead to differential access of analog magnitude representation is a key question for future research.