This 30-person controlled study is the first to show direct transfer-of-benefits from perceptual discrimination training to working memory performance in older adults. Moreover, using electroencephalography to evaluate participants before and after training revealed neural evidence of functional plasticity in older adult brains. In layman's terms, the healthy older participants who trained with Posit Science software not only improved their perceptual abilities significantly, but also increased the accuracy of their visual working memory by about ten per cent and had physical changes in their brains.