Editing Intelligence (section)

=== ''g'' factor in non-humans ===
{{Main|1=g factor in non-humans|l1=''g'' factor in non-humans}}

Evidence of a general factor of intelligence has been observed in non-human animals. First described in [[humans]], the ''g'' factor has since been identified in a number of non-human species.<ref name="Reader">Reader, S. M., Hager, Y., & Laland, K. N. (2011). "The evolution of primate general and cultural intelligence". ''Philosophical Transactions of the Royal Society'' B: Biological Sciences, 366(1567), 1017–1027.</ref>

Cognitive ability and intelligence cannot be measured using the same, largely verbally dependent, scales developed for humans. Instead, intelligence is measured using a variety of interactive and observational tools focusing on [[innovation]], [[habit]] reversal, [[social learning theory|social learning]], and responses to [[novelty]]. Studies have shown that ''g'' is responsible for 47% of the individual variance in cognitive ability measures in [[primates]]<ref name="Reader" /> and between 55% and 60% of the variance in [[mus musculus|mice]] (Locurto, Locurto). These values are similar to the accepted variance in [[IQ]] explained by ''g'' in humans (40–50%).<ref>Kamphaus, R. W. (2005). ''Clinical assessment of child and adolescent intelligence''. Springer Science & Business Media.</ref>