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Tool making is much rarer, but has been documented in orangutans, [31] bonobos and bearded capuchin monkeys. Research in 2007 shows that chimpanzees in the Fongoli savannah sharpen sticks to use as spears when hunting, considered the first evidence of systematic use of weapons in a species other than humans.
In a multi-species study, it was shown that chimpanzees, bonobos and orangutans passed the False Belief Test (see above). [ 25 ] In 2009, a summary of the ToM research, particularly emphasising an extensive comparison of humans, chimpanzees and orang-utans, [ 28 ] concluded that great apes do not exhibit understanding of human referential ...
The following are two lists of animals ordered by the size of their nervous system.The first list shows number of neurons in their entire nervous system. The second list shows the number of neurons in the structure that has been found to be representative of animal intelligence. [1]
It is an extended version of the Orangutan Personality Questionnaire, which was an extended version of King and Figueredo's [1] Chimpanzee Personality Questionnaire. The HPQ has been used to assess personality in non-human primate species (e.g. chimpanzees, orangutans, rhesus macaques). The HPQ contains 54 adjectives followed by a description.
In his paper, Matsuzawa claims that his tradeoff theory has support from a phylogenetic as well as ontogenetic perspective. In human beings, the youth often outperform adults on certain memory tasks. In the course of cognitive development, human children may acquire linguistic skills at the cost of possessing a chimpanzee-like photographic memory.
According to the research of Dr. Sue Savage-Rumbaugh, Kanzi "can understand individual spoken words and how they are used in novel sentences". For example, the researcher asked Kanzi to go get the carrot in the microwave, Kanzi went directly to the microwave and completely ignored the carrot that was closer to him, but not in the microwave. [ 26 ]
Anne E. Russon is a Canadian psychologist and primatologist. She is a researcher and Professor of Psychology at Glendon College, York University, Toronto, Ontario, Canada whose research focuses on learning and intelligence in ex-captive Bornean orangutans. [1]
Started in 1978, it is one of the longest running laboratory research projects on chimpanzee intelligence. Matsuzawa has been a part of the project since the beginning. Matsuzawa has also studied tool use in the wild chimpanzees at Bossou, Guinea, West Africa since 1986. The bossou chimpanzee community consists of about 12 individuals and has ...