. Author manuscript; available in PMC: 2019 Apr 1.

Published in final edited form as: IEEE Trans Hum Mach Syst. 2018 Jan 23;48(2):136–148. doi: 10.1109/THMS.2018.2791562

TABLE I.

Metrics of Performance and Communication

Measures	Description
Completed pieces (/minute)	The number of puzzle pieces that matched the target in one game per minute.
Cooperative efficiency (%)	The time of collaboratively manipulating the puzzle piece divided by total manipulating time.
Total play time (s)	The time of playing one game (the maximum allowed play time of Puzzle Game was 300s).
Back-and-forth sentences(/per minute)	One back-and-forth sentence was defined as one player spoke and his/her partner responded.
Words count of one player (/minute)	The total number of words that each player spoke in one game divided by the total play time.