The brain stimulator gave patients bigger improvements in their emotional well-being andability to think that would have been expected in sicker patients.
The ZPen also has no mouse mode and the software lacks a few features of the IOGEAR product, most important among these are searching for text in a note (promised as a free download coming soon), and another being the ability to quickly copy pieces of a note to the Clipboard.
The studies together indicate that math ability is inborn in many species, with number sense, mathematical skills and verbal ability perhaps being separate talents in humans that we later learn to combine.