A user-friendly reliable process is provided to help diagnose (assess) and treat (rehabilitate) impairment or deficiencies in a person (subject or patient) caused by a traumatic brain injury (TBI) or other neurocognitive disorders. The economical, safe, effective process can include: generating and electronically displaying a virtual reality environment (VRE) with moveable images identifying and letting the TBI person perform a task in the VRE electronically inputting and recording the performance data with an electronic interactive communications device electronically evaluating the persons performance and assessing the persons impairment by electronically determining a deficiency in the persons cognitive function (e.g. memory, recall, recognition, attention, spatial awareness) and/or motor function (i.e. motor skills, e.g. balance) as a result of the TBI or other neurocognitive disorder.
