Evaluating a Novel Method of EEG Evoked Response Potential Analysis in Sport Concussion Assessment - Test Stability and Effect of Concussion

Phase 1: Inclusion Criteria: * Aged 14-26 years * Enrolled in a recognized high school or college * Willingness to participate and able to give informed assent (child) and/or consent (parent for minors or adult 18+ years of age for self) * Currently participate in a non-contact sport. * Member of an organized athletic team or regularly train for and participate in independent athletic contests during at least one sports season. * Right handed subject Exclusion Criteria: * Currently participate in a contact sport. * Bald or has dread locks/long and thick hair. * Any diagnosed psychiatric disorder * History of CNS injury or disease * Any neuropsychological disorders * History of learning disability. * History of any medication affecting CNS. * Active head lice infection, open scalp wound, deafness or/and blindness. * Sustained a diagnosed concussion within the previous 6 months Phase 2a: Inclusion Criteria: * Aged 14-26 years. * For Arm 1: Within 1 week post-concussion (sports-related). * For Arm 1: Currently symptomatic * Willingness to participate and able to give informed assent (child) and/or consent (parent for minors or adult 18+ years of age for self). * Member of an organized athletic team or regularly train. * Enrolled in a high school or college. Exclusion Criteria: * Bald or has dread locks/long and thick hair. * Current or history of ADHD. * Active head lice infection, open scalp wound, deafness or/and blindness. * Sustained a concussion within the past 6 months. * Current or history of moderate or severe TBI, any brain injury with positive neuroimaging findings, or brain surgery. Phase 2b: Inclusion Criteria: * Aged 14-26 years. * Willingness to participate and able to give informed assent (child) and/or consent (parent for minors or adult 18+ years of age for self). * Member of a contact sport team which carries out head impact monitoring over the course of the playing season. * Enrolled in a high school or college. Exclusion Criteria: * Bald or has dread locks/long and thick hair. * Current or history of ADHD. * Active head lice infection, open scalp wound, deafness or/and blindness. * Sustained a concussion within the past 6 months. * Current or history of moderate or severe TBI, any brain injury with positive neuroimaging findings, or brain surgery. * Any diagnosed psychiatric disorder. * History of CNS injury or disease * Any neuropsychological disorders. * History of learning disability. * History of any medication affecting CNS.