Participants evaluating the OptiMAT app may contact the UAMS Brain Imaging Research Center staff for technical support at brain.imaging.research.center@gmail.com or 501-420-2653. The Brain Imaging Research Center staff will respond during standard business hours (Monday through Friday, 8 a.m. through 5 p.m. CST). Please note that we are unable to field technical support requests for individuals not enrolled in our research studies.