“…Like humans, it is now established that variations in general cognitive performance can be detected across individuals in a variety of animal species including mice (Galsworthy et al, 2002;Matzel et al, 2003;Sauce et al, 2018), rats (Anderson, 1993;Locurto and Scanlon, 1998), birds (Shaw et al, 2015; but see Sorato et al, 2018), dogs (Arden and Adams, 2016), and several non-human primates (Herndon et al, 1997;Banerjee et al, 2009;Herrmann et al, 2010;Beran and Hopkins, 2018;Eisenreich and Hayden, 2018;Damerius et al, 2019). Notably, while the literature on human intelligence is replete with examples of the relationship between IQ test performance and real-life outcomes, very few such demonstrations have been reported in non-human animals.…”