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The Social Brain
Ben Seymour
Wellcome Trust Centre for Neuroimaging
ESRC Centre for Economic Learning and Social Evolution
Beauty contest game
• You can select any number between 0 and 100.
• Whoever selects the number closest to 2/3 of the average of all the players’ numbers is the winner.
• Winner gets a prize!
Cooperative signals:many eyes are better than two..
Many eyes are better than two
The benefits of teamwork:
To share or not to share?
There’s a snake, honest!
Someone terrible lives here
Do we really need to fight?
Retributivism Consequentialism
empathy
Schadenfreude
Cooperation game with actors
Watch each other get electric shocks
Record brain activity
player 1 player 2
cooperate defect
cooperate 10/10 0/15
defect 15/0 1/1
Empathy for the nice personSchadenfreude for the nasty person
Hunting stags and rabbits
Theory of Mind
Theory of mind
• Hierarchical value-functions
– The brain codes parameters for working out how sophisticated others are
first order second order third order
Human pro-sociality:
• Trust and reciprocity.• Reputation formation.
– is it enough?
The importance of culture
Culture seeds altruism
• Human culture: learning how to make good decisions from others:• Observation• Apprenticeship• Teaching
Culture seeds altruism
• Human culture: learning how to make good decisions from others:• Observation• Apprenticeship• Teaching
C
Now for the results:
• Acknowledgements:– Wako Yoshida– Tania Singer– Ray Dolan– Karl Friston– Chris Frith