As the primary investigator of The NIH Toolbox®, Richard Gershon, PhD, has led a team of hundreds of scientists to develop and evolve state-of-the-art digital assessments of cognition, motor, sensation and emotion which has been used by clinicians, investigators and academics for nearly two decades.   In this episode, Gershon explains how the third version of The NIH Toolbox® app developed for the iPad, provides test batteries for cognition, motor, emotional and sensory functioning.