Key points from article :
Novel robotic arm tracks 3D arm movements of stroke patients.
Machine learning analyzes data to create an "arm nonuse" metric.
Socially assistive robot motivates and guides participants.
14 participants tested, showing significant variability in hand use.
System deemed safe, easy to use, and with high user experience scores.
Future research may personalize assessments using facial expressions and diverse tasks.
Technology could provide objective data to physiotherapists for better treatment planning.
Study by Maja Mataric from University of Southern California, published in Science Robotics.
