Matthew Campbell
Matthew Campbell appears on this site as first author of the 2011 PLoS ONE study of contagious yawning in 23 chimpanzees.
Who they are
The work of Matthew Campbell reaches this site through the paper listed below. On this site the name is tied to Contagious Yawning, In-Group and Out-Group Bias.
Key papers
Campbell, M. W., & de Waal, F. B. M. (2011). Ingroup-outgroup bias in contagious yawning by chimpanzees supports link to empathy. PLoS ONE. What it reports: Twenty-three chimpanzees watched videos of familiar and unfamiliar chimpanzees yawning. They yawned more after familiar yawns than after unfamiliar yawns or control clips.
Key ideas
Contagious Yawning: The tendency to yawn after seeing, or reading about, another person's yawn, strongest among people who are close.
In-Group and Out-Group Bias: The tendency to favour the group one belongs to, shown in experiments with trivial, random and assigned groups.
Sources
- Campbell, M. W., & de Waal, F. B. M. (2011). Ingroup-outgroup bias in contagious yawning by chimpanzees supports link to empathy. PLoS ONE.