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A 2012 study identifying individual chimpanzees that consistently performed highly on cognitive tasks found clusters of abilities instead of a general factor of intelligence. [48] This study used individual-based data and claim that their results are not directly comparable to previous studies using group data that have found evidence for g ...
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 ...
Russon began to study orangutans because she felt that they had been neglected in previous research on great ape intelligence, despite growing evidence of their complexity. [4] Her choice to study ex-captives was born out of several factors. First, the lifestyle of wild orangutans was not conducive to up-close study. [4]
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]
In a new study, published today in the journal iScience, the Japanese researchers conducted tests to see if non-human primates experience the audience effect as well.. After analysing thousands of ...
Franciscus Bernardus Maria de Waal (29 October 1948 – 14 March 2024) was a Dutch-American primatologist and ethologist.He was the Charles Howard Candler Professor of Primate Behavior in the Department of Psychology at Emory University in Atlanta, Georgia, director of the Living Links Center at the Yerkes National Primate Research Center at Emory, [1] and author of numerous books including ...
Another study (Chen & Li, 2001) sequenced 53 non-repetitive, intergenic DNA segments from human, chimpanzee, gorilla and orangutan. [8] When the DNA sequences were concatenated to a single long sequence, the generated neighbor-joining tree supported the Homo - Pan clade with 100% bootstrap (that is that humans and chimpanzees are the closest ...
For example, several studies have shown that performance is better on, for example, a color discrimination (e.g. blue vs green) after the animal has learned another color discrimination (e.g. red vs orange) than it is after training on a different dimension such as an X shape versus an O shape. The reverse effect happens after training on forms.