APPENDIX 1.

Five Robot Actions of the Robot Imitation Test Along With a Description of Component Motions

Action & Total Score	Description	Coding
Left & right guard (6)	In the left guard, the robot covers its face with the left hand and steps back with the right leg. In the right guard, the robot covers its face with the right hand and steps back with the left leg.	Arm score: 3: Mirrored, exact arm movement 2: Unmirrored, exact arm movement 1: Attempted an arm movement 0: No movement Leg score: 3: Mirrored, exact leg movement 2: Unmirrored, exact leg movement 1: Attempted an leg movement 0: No movement
Left & right kick (6)	In the left kick, the robot moves both hands in front of its face and kicks forward with its left leg. In the right kick, the robot moves both hands in front of its face and kicks forward with its right leg.	Arm score: 3: Mirrored, exact arm movement 2: Unmirrored, exact arm movement 1: Attempted a arm movement 0: No movement Leg score: 3: Mirrored, exact leg movement 2: Unmirrored, exact leg movement 1: Attempted a leg movement 0: No movement
Left & right chop (3)	In the left chop, the robot lifts its left arm up with the elbow slightly bent, then straightens the elbow, and brings the arm down. In the right chop, the above sequence is carried out with the right arm.	Arm score: 3: Extended elbow along with exact arm movement 2: Mirrored, exact arm movement without elbow extension 1: Unmirrored, exact arm movement 0: No movement
Left & right punch (7)	In the left punch, the robot extends both arms to the left, asymmetrically, and steps forward with the left leg. In the right punch, the robot extends both arms to the right, asymmetrically, and steps forward with the right leg.	Arm score: 4: Mirrored, exact asymmetrical arm movement 3: Unmirrored, exact asymmetrical arm movement 2: Symmetrical arm movement 1: Only one arm used to punch 0: No arm movement Leg score: 3: Mirrored, exact leg movement 2: Unmirrored, exact leg movement 1: Attempted a leg movement 0: No movement
Armshake (7)	In the armshake, the robot steps forward with its right leg. It moves its left hand in front of its chest and then it bends and straightens its left elbow 3 times, as if shaking its arms.	Arm score: 4: Mirrored and synchronized arm movement 3: Mirrored, unsynchronized arm movement 2: Unmirrored, synchronized arm movement 1: Unmirrored, unsynchronized arm movement 0: No arm movement Leg score: 3: Mirrored, exact leg movement 2: Unmirrored, exact leg movement 1: Attempted some leg movement 0: No leg movement