Sarah (full name Sarah Anne) (August 1959 – July 2019)[1] was an enculturated research chimpanzee whose cognitive skills were documented in the 1983 book The Mind of an Ape, by David Premack and Ann James Premack.
One of the chimpanzees failed to learn a single word, but Sarah, Elizabeth, and Peony were able to parse and also produce streams of tokens which obeyed a grammar.
She used a special board with plastic symbols to correctly parse various syntactic expressions including if-then-else.
Sarah was even able to recognize colors and connect them with matching objects, a talent that Premack noted, doubting that a pigeon could have.
[2] When the Premacks decided they no longer wanted to work with chimpanzees in 1987, Sarah was sent to Sarah Boysen's Chimp Center at the Ohio State University, where she lived and worked with other enculturated chimpanzees: Kermit, Darrell, Bobby, Sheba, Keeli, Ivy, Harper, and Emma.