Recent Media Coverage of our Research:

A number of articles about the relationship between chimpanzees' ability to delay gratification and their general intelligence:

Science Daily


“From rats to humans, a brain knows when it can't remember” (July 27, 2022).  NPR. Click here for article. To hear the All Things Considered radio commentary on this, click here.

Click here to read a short article from APA about some of our planning research with children, chimps, and monkeys.

Click here to read a short article from APA about some of our metacognition research with capuchin monkeys.

Click here for a news release on some of Audrey Parrish's dissertation research.

Click here for an article featuring our research with chimpanzees and self-control that talks about the evolution of hominids and chimpanzee behavior. [Only for individual use.]

Click here to read about our recent research investigating the metacognitive abilities of chimpanzees. 

Click here to read about our recent research investigating the planning abilities of children, chimpanzees, and monkeys who performed computerized maze tasks. 

Our work on chimpanzee metacognition is referenced in this comic!

Click here for an APA Science Brief about our lab's research on self-control. And here is another report from the APA conference about some of this research.


Visual Illusions in Monkeys and Humans:
Daily Mail
Economic Times
Tech Times


Metacognition and confidence judgments in chimpanzees:
NSF News website


Planning in chimpanzees, monkeys, and children:
Science Daily


Perceptual illusions about food items in Chimpanzees: website


Self-Control in Nonhuman Primates:
APA Science Brief


Chimpanzee Accountants (part of article on Animal Minds)
Science News


Metacognition in chimpanzees:
Science Daily
Association for Psychological Science


Quantity judgments by bears (with Jennifer Vonk):
Scientific American
BBC Nature
Business Standard
Daily Mail

Animals using computer games as enrichment:

BBC Nature
BBC Future

Speech perception in a chimpanzee (with Lisa Heimbauer and Michael Owren):
BBC Nature
Science Now
Beautiful Brain
Science News


Research about nonhuman primates and humans playing economic games of cooperation:
(with Sarah Brosnan, Bart Wilson, Audrey Parrish, Tim Flemming, Lisa Heimbauer, Kate Talbot, Susan Lambeth, and Steve Shapiro)
New Scientist


Research about chimpanzees' ability to judge liquids:


Research about animals’ math skills:
APA's Monitor on Psychology


Delay of gratification in chimpanzees:
Scientific American Mind
ScienceNow Daily News
New Scientist
Wall Street Journal


Chimpanzee Bartering (with Sarah Brosnan)
(research article available here)


Monkey Metacognition (with J. David Smith, Bonnie Perdue, and Barbara Church):
BBC Earth News
Discover Magazine
New Scientist
Click here for PodCast interview with J. David Smith
NOTE: This is a very large MP3 file (6.5 MB)
Science Daily
APA PeePs (Particularly Exciting Experiments in Psychology)


Chimpanzee Memory for Arabic Numeral Meaning:
New Scientist