Numerical ordering in a chimpanzee (Pan troglodytes): Planning, executing, and monitoring.

Memory-scanning: mental processes revealed by reaction-time experiments.

Saul Sternberg · PubMed · 1969 · 2K citations

Social Sciences, Behavioral Sciences, Psychology +14

The Child's Understanding of Number

U. A. Easley, Rochel Gelman, C. H. Galistell · Educational Researcher · 1979 · 1.7K citations

Education, Mathematics, Mathematics Education +9

Use of numbers by a chimpanzee

Tetsuro Matsuzawa · Nature · 1985 · 577 citations

Social Sciences, Biology, Zoology +10

Numerical competence in animals: Definitional issues, current evidence, and a new research agenda

Hank Davis, Rachelle Pérusse · Behavioral and Brain Sciences · 1988 · 511 citations

Social Sciences, Psychology, Zoology +14

Numerical competence in a chimpanzee (Pan troglodytes).

Sarah T. Boysen, Gary G. Berntson · Journal of comparative psychology · 1989 · 393 citations

Social Sciences, Psychology, Zoology +17