Jensvold, Mary Lee (2018) Lessons from chimpanzee sign language studies. Animal Sentience 20(17)
David M. Peña-Guzmán, Can nonhuman animals commit suicide?
Claims are often made about behaviors being unique to humans; the evidence usually shows they are not. Sign language studies on chimpanzees may provide a useful model for comparative studies of suicide. A productive approach to comparative studies is to focus on observable behaviors rather than getting lost in the pitfalls of vague definitions and changing measures.
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