A Valid and Reliable Virtual Reality Tool for Assessment of Arm Nonuse Post-Stroke

A VR-NonUse virtual reality assessment provides a robust index of arm nonuse in chronic stroke, with high internal-consistency reliability and strong validity signals.

• Why it matters: Arm nonuse after stroke reflects interacting cognitive and motor limits, yet many assessments may not capture how changing task demands alter arm choice.
• What they did: Fifty-one individuals with stroke and 23 controls completed VR-NonUse across three cognitive–motor demand conditions, with paretic arm choice recorded per trial; usability and tolerability were also tested.
• The result: Paretic arm choice on VR-NonUse was associated with established nonuse measures more than with motor impairment, and higher cognitive demand reduced paretic arm choice, supporting concurrent, discriminant, and construct validity.

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