Pilot and Feasibility of MEMI for Chronic Traumatic Brain Injury

Inclusion criteria: For participants with TBI: * Moderate-severe TBI. All participants were determined to have a history of moderate-severe TBI upon joining the Vanderbilt Brain Injury Patient Registry. This determination was made based on the Mayo Classification Scale. * All participants are at least 6 months post-injury at the time of study enrollment and thus exhibit chronic and stable neuropsychological profiles. * Age ranging from 18-60, to rule out developmental TBI and limit influence of age-related cognitive decline. For all participants: * Oral and written language skills sufficient for the study tasks. This will be screened in the initial video conference contact with the participant, when consent is obtained. * Participants must own a smartphone to access the Gorilla online behavioral experiment platform from their mobile phones. Exclusion criteria: For participants with TBI: • History of medical or neurological disease affecting the brain or language, before or after the qualifying TBI. For non-injured comparison peers: • History of neurological or cognitive disability, including TBI For all participants: * Any disability (e.g., vision impairment, hard of hearing, aphasia or other neurologic condition) that limits ability to read, type, or verbally communicate. * Demonstrates inability to receive and respond to a text message after training by study personnel.