Leigh Ann Hartsfield

Reasoning by inference: Further studies on exclusion in grey parrots (Psittacus erithacus).

Irene M. Pepperberg, Adrienne Koepke, Paige Livingston et al. · Journal of comparative psychology · 2013 · 68 citations

Life Sciences, Behavioral Sciences, Zoology +17

Can Grey parrots (Psittacus erithacus) succeed on a “complex” foraging task failed by nonhuman primates (Pan troglodytes, Pongo abelii, Sapajus apella) but solved by wrasse fish (Labroides dimidiatus)?

Irene M. Pepperberg, Leigh Ann Hartsfield · Journal of comparative psychology · 2014 · 46 citations

Life Sciences, Biology, Zoology +17

Initial evidence for eliciting contrafreeloading in grey parrots (Psittacus erithacus) via the opportunity for playful foraging.

Gabriella E. Smith, Diana Greene, Leigh Ann Hartsfield et al. · Journal of comparative psychology · 2021 · 13 citations

Life Sciences, Animal Sciences, Zoology +10

Piagetian liquid conservation in grey parrots (Psittacus erithacus).

Irene M. Pepperberg, Suzanne L. Gray, Justin S. Lesser et al. · Journal of comparative psychology · 2017 · 12 citations

Life Sciences, Psychology, Zoology +7