The evolution of self-control.

Published

Journal Article

Cognition presents evolutionary research with one of its greatest challenges. Cognitive evolution has been explained at the proximate level by shifts in absolute and relative brain volume and at the ultimate level by differences in social and dietary complexity. However, no study has integrated the experimental and phylogenetic approach at the scale required to rigorously test these explanations. Instead, previous research has largely relied on various measures of brain size as proxies for cognitive abilities. We experimentally evaluated these major evolutionary explanations by quantitatively comparing the cognitive performance of 567 individuals representing 36 species on two problem-solving tasks measuring self-control. Phylogenetic analysis revealed that absolute brain volume best predicted performance across species and accounted for considerably more variance than brain volume controlling for body mass. This result corroborates recent advances in evolutionary neurobiology and illustrates the cognitive consequences of cortical reorganization through increases in brain volume. Within primates, dietary breadth but not social group size was a strong predictor of species differences in self-control. Our results implicate robust evolutionary relationships between dietary breadth, absolute brain volume, and self-control. These findings provide a significant first step toward quantifying the primate cognitive phenome and explaining the process of cognitive evolution.

Full Text

Duke Authors

Cited Authors

  • MacLean, EL; Hare, B; Nunn, CL; Addessi, E; Amici, F; Anderson, RC; Aureli, F; Baker, JM; Bania, AE; Barnard, AM; Boogert, NJ; Brannon, EM; Bray, EE; Bray, J; Brent, LJN; Burkart, JM; Call, J; Cantlon, JF; Cheke, LG; Clayton, NS; Delgado, MM; DiVincenti, LJ; Fujita, K; Herrmann, E; Hiramatsu, C; Jacobs, LF; Jordan, KE; Laude, JR; Leimgruber, KL; Messer, EJE; Moura, ACDA; Ostojić, L; Picard, A; Platt, ML; Plotnik, JM; Range, F; Reader, SM; Reddy, RB; Sandel, AA; Santos, LR; Schumann, K; Seed, AM; Sewall, KB; Shaw, RC; Slocombe, KE; Su, Y; Takimoto, A; Tan, J; Tao, R; van Schaik, CP; Virányi, Z; Visalberghi, E; Wade, JC; Watanabe, A; Widness, J; Young, JK; Zentall, TR; Zhao, Y

Published Date

  • May 2014

Published In

Volume / Issue

  • 111 / 20

Start / End Page

  • E2140 - E2148

PubMed ID

  • 24753565

Pubmed Central ID

  • 24753565

Electronic International Standard Serial Number (EISSN)

  • 1091-6490

International Standard Serial Number (ISSN)

  • 0027-8424

Digital Object Identifier (DOI)

  • 10.1073/pnas.1323533111

Language

  • eng