Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Total time of caring behaviors presented by each participant during interaction in the (A) face group and (B) no-face group. Letters indicate each participant. * shows participants who refused the robot. The alphabets denote the participant IDs.
