Cook and Wilson (2010) show data from two subjects who were trained with a regime similar to the chimp (4 blocks/day for 75 days). They substantially out-perfor

Cook and Wilson (2010) show data from two subjects who were trained with a regime similar to the chimp (4 blocks/day for 75 days). They substantially out-performed the chimp, which successfully completed 80% of trials vs. 93 and 96.5 percent for the humans. Paper here: https://www.researchgate.net/publication/45629789_Do_young_chimpanzees_have_extraordinary_memory https://www.researchgate.net/publication/45629789_Do_young_c... I wouldn't want to make strong claims on the size of the difference based on an N=3, but it's certainly sufficient as an existence proof, especially since the humans are performing near ceiling.