Virtual reality study reveals how age impacts your reach

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Aged 18-28 (young adults \[YA\] group) or 65-75 (healthy older adults \[HOA\] group) * Right-handed * Normal or corrected-to-normal vision (glasses or contact lenses permitted) * Clear and comfortable vision through the head-mounted display during a brief fitting (very bulky glasses may be incompatible) * No self-reported history of neurological or psychiatric disorders, as confirmed by participant report and cross-checked against a standardized list of relevant medications * Able to provide informed consent and follow experimental instructions in French or English Additional criteria for HOA * Normal cognitive functioning (Montreal cognitive assessment \[MoCA\] score ≥ 26) * No self-reported acute or chronic pain in the dominant arm, shoulder, or elbow that would preclude performing repetitive arm movements in space. * Self-reported full functional range of motion in the dominant arm (able to extend the arm fully without discomfort or restriction) Exclusion Criteria: * Individuals currently playing video games more than 5 hours/week. * Uncorrected visual, auditory, or motor impairments that would interfere with task performance. * Participant height outside the range of 1.50-1.80 m. * Self-reported diagnosis of a neurodegenerative disease (e.g., Parkinson's disease, Alzheimer's disease) * Self-reported use of medications known to significantly affect cognitive or motor function (a list of relevant medications will be presented during screening). * Cervical pain that could preclude wearing the VR headset during the full duration of the experimental session. * Self-reported history of severe motion sickness or vestibular issues that could be exacerbated by VR exposure * High susceptibility to cybersickness, as assessed via the Visually Induced Motion Sickness Susceptibility Questionnaire which was developed specifically for pre-exposure screening; cut-off: ≥ 12. * Individuals for whom the headset cannot be properly adjusted, e.g., due to an interpupillary distance outside the adjustment range of the head-mounted display (i.e., \<53 mm or \>75 mm).