There exists a paradox – general factors of intelligence
exist among individual differences (g) in performance in several species, and also at the aggregate level (G); however, there is ambiguous evidence for the existence of g when analyzing data using a mixed approach, that is, when comparing individuals of different species using the same cognitive ability battery. Here, we present an empirical solution to this paradox.
Ref.
Woodley of Menie, M.A., Fernandes, H.B.F., te Nijenhuis, J., Figueredo, A.J., & Peñaherrera-Aguirre, M. (2017). General intelligence is a source of individual differences between species: Solving an anomaly. Behavioral & Brain Sciences, 40, e223.
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