Different aliases for `actor` and `recipient` in data(chimpanzees)?
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In the chimpanzees dataset, there are seven animals (coded 1 to 7) who participate as 'actor'. There are also seven animals (coded 2 to 8) who participate as 'recipient', in trials in which a recipient is present. The Silk, et al. (2005) paper this dataset comes from states that "all subjects participated in the experiment as both actors and potential recipients", suggesting the two coding systems (1 to 7 and 2 to 8) are referring to the same seven chimps. Also, actor 1 is never paired with recipient 2, actor 2 never with recipient 3, etc. suggesting that any give chimp's recipient code is just 1 plus their actor code - is this correct?
Sounds like solid reasoning, but I don't know. I will have to ask Joan!
Would be a nice homework problem to consider random effects on recipient/dyad, but since there is so little altruism in the data, probably nothing to find.