https://www.sciencedaily.com/releases/2019/11/191112160216.htm

Dr. Celso M. de Melo, a computer scientist from the U.S. Army Combat Capabilities Development Command's Army Research Laboratory at its ARL West campus in Playa Vista, California, along with Japan's Gifu University Professor Kazunori Terada, share common research interests, in particular, on human-machine cooperation and the social effects of emotion in human-machine interaction. Their research shows people readily engage in social categorization distinguishing humans from machines, which leads to reduced cooperation with machines.

A simple cultural cue -- the ethnicity of the machine's virtual face -- mitigated this bias for participants from two distinct cultures (Japan and United States), the researchers said.