Lemurs and macaques show similar numerical sensitivity.

Journal Article (Journal Article)

We investigated the precision of the approximate number system (ANS) in three lemur species (Lemur catta, Eulemur mongoz, and Eulemur macaco flavifrons), one Old World monkey species (Macaca mulatta) and humans (Homo sapiens). In Experiment 1, four individuals of each nonhuman primate species were trained to select the numerically larger of two visual arrays on a touchscreen. We estimated numerical acuity by modeling Weber fractions (w) and found quantitatively equivalent performance among all four nonhuman primate species. In Experiment 2, we tested adult humans in a similar procedure, and they outperformed the four nonhuman species but showed qualitatively similar performance. These results indicate that the ANS is conserved over the primate order.

Full Text

Duke Authors

Cited Authors

  • Jones, SM; Pearson, J; DeWind, NK; Paulsen, D; Tenekedjieva, A-M; Brannon, EM

Published Date

  • May 2014

Published In

Volume / Issue

  • 17 / 3

Start / End Page

  • 503 - 515

PubMed ID

  • 24068469

Pubmed Central ID

  • PMC3966981

Electronic International Standard Serial Number (EISSN)

  • 1435-9456

Digital Object Identifier (DOI)

  • 10.1007/s10071-013-0682-3


  • eng

Conference Location

  • Germany