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Behav Brain Sci. 2017 Jan;40:e211. doi: 10.1017/S0140525X16001709.

G and g: Two markers of a general cognitive ability, or none?.

The Behavioral and brain sciences

Charles Locurto

Affiliations

  1. College of the Holy Cross,Worcester,MA [email protected].

PMID: 29342680 DOI: 10.1017/S0140525X16001709

Abstract

The search for general processes that underlie intelligence in nonhumans has followed two strategies: one that concerns observing differences between nonhuman species (G), the second that concerns observing individual differences within a nonhuman species (g). This commentary takes issue with both attempts to mark a general factor: Differential responding to contextual variables compromises the search for G, and the lack of predictive validity compromises g.

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