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Chimp cooperation (Collaboration and helping in chimpanzees (male wild…

- - - - trained two chimps to simultaneously pull two adjacent ropes to get food from heavy box
        
        naive ones then paired up with experienced ones- most couldn't do it
    - - had to pull handles simulatenously-struggle.
        
        contraints upon subordinates
  - - - will also actively choose more effective partner (2006b)
        
        for aprtner chocie: win-stay/ lose-shift strategy
  - - - 3 chimps, all helped in 'out of reach' tasks
      - not in other tasks: problems in identifying that help was needed?
      - chimps were human-reared
    - - 36 ngamba chimps
      - they help
      - rewarding helping does not increase amount of helping
      - experiment 2: helping is more costly. still do it
      - experiment 3: will let other chimp in to get food
  - - - warneken et al. 2006
        
        children vs chimps: engage in social games. when adult stops, children try to reengage, chimps don't
- - - - collaboration with shared goals
      - cooperative communication
- - - - helping condition, and similar but no help required condition
      - helped get out of reach objects
- - - - expanded developmental windows allow this to develop
- - - - distribute an endowment
    - - player 2 will triple allocation from player 1, can pass some back
    - - dictator, but recipient can reject
    - - dictator, but third party can impose sanctions (at a cost to themself) to punish allocator