Eliana Hadjiandreou
@elianahadtime.bsky.social
Postdoc @UTAustin studying prosociality & moral judgment, PhD
@penn_state, former fellow at @Stanford. @Fulbrightprgrm alum. Sometimes writes for @Medium.
https://exh960.wixsite.com/mysite
@penn_state, former fellow at @Stanford. @Fulbrightprgrm alum. Sometimes writes for @Medium.
https://exh960.wixsite.com/mysite
Reposted by Eliana Hadjiandreou
Are humans the only rational animals?
For thousands of years, we’ve thought so.
Our new paper, out today in Science, suggests otherwise!
We present evidence that chimpanzees possess several core capacities for rational thought.
Check out Emily's thread: bsky.app/profile/emil...
For thousands of years, we’ve thought so.
Our new paper, out today in Science, suggests otherwise!
We present evidence that chimpanzees possess several core capacities for rational thought.
Check out Emily's thread: bsky.app/profile/emil...
Are humans really the only rational animals? Our NEW PAPER 🎉 out in @science.org suggests otherwise! In a large collaboration led with my joint first author @hanna-schleihauf.bsky.social, we show that “Chimpanzees rationally revise their beliefs” 🧵
Chimpanzees rationally revise their beliefs
The selective revision of beliefs in light of new evidence has been considered one of the hallmarks of human-level rationality. However, tests of this ability in other species are lacking. We examined...
www.science.org
October 30, 2025 at 6:52 PM
Are humans the only rational animals?
For thousands of years, we’ve thought so.
Our new paper, out today in Science, suggests otherwise!
We present evidence that chimpanzees possess several core capacities for rational thought.
Check out Emily's thread: bsky.app/profile/emil...
For thousands of years, we’ve thought so.
Our new paper, out today in Science, suggests otherwise!
We present evidence that chimpanzees possess several core capacities for rational thought.
Check out Emily's thread: bsky.app/profile/emil...
Why do we derogate effective altruists, activists, & other radically prosocial individuals? In new work, we discuss how doing good that deviates from social norms gets stigmatized. New preprint w/ @dcameron.bsky.social @tlau.bsky.social @desmond-ong.bsky.social: osf.io/preprints/ps...
October 8, 2025 at 6:05 PM
Why do we derogate effective altruists, activists, & other radically prosocial individuals? In new work, we discuss how doing good that deviates from social norms gets stigmatized. New preprint w/ @dcameron.bsky.social @tlau.bsky.social @desmond-ong.bsky.social: osf.io/preprints/ps...
Never seen science conducted so thoroughly.
This is Finny. He doesn’t go chasing waterfalls. He carefully studies their timing and arrives in advance. 14/10 very impressive (TT: jordancain70)
September 16, 2025 at 12:28 PM
Never seen science conducted so thoroughly.
Reposted by Eliana Hadjiandreou
This is Thanos. He has figured out how to rest and babysit at the same time. Very impressive, very Montessori. 13/10 (TT: thanosthesaint)
August 28, 2025 at 9:07 PM
This is Thanos. He has figured out how to rest and babysit at the same time. Very impressive, very Montessori. 13/10 (TT: thanosthesaint)
Reposted by Eliana Hadjiandreou
Children build math skills on a “cognitive bridge” between space & number. But where does it come from? Our new study finds monkeys transfer learning and abstractions across geometry & numerosity, revealing the evolutionary roots of basic math development. 🧪🧠
www.pnas.org/doi/10.1073/...
www.pnas.org/doi/10.1073/...
Cognitive bridge between geometric and numerical learning in monkeys | PNAS
Educational research highlights strong developmental links between numerical and spatial
cognition in humans, often shaped by cultural tools like t...
www.pnas.org
August 20, 2025 at 12:39 PM
Children build math skills on a “cognitive bridge” between space & number. But where does it come from? Our new study finds monkeys transfer learning and abstractions across geometry & numerosity, revealing the evolutionary roots of basic math development. 🧪🧠
www.pnas.org/doi/10.1073/...
www.pnas.org/doi/10.1073/...
Reposted by Eliana Hadjiandreou
I’m watching a live stream
August 7, 2025 at 2:26 PM
I’m watching a live stream
Reposted by Eliana Hadjiandreou
“When people viewed virtual avatars with coughs or rashes, their brains triggered an immune response.”
It would be fascinating to extend this research to people who don’t believe the diseases portrayed are communicable, and to animals that presumably don’t grasp germ theory.
It would be fascinating to extend this research to people who don’t believe the diseases portrayed are communicable, and to animals that presumably don’t grasp germ theory.
The brain fires up immune cells when sick people are nearby
When people viewed virtual avatars with coughs or rashes, their brains triggered an immune response.
www.nature.com
July 30, 2025 at 4:16 AM
“When people viewed virtual avatars with coughs or rashes, their brains triggered an immune response.”
It would be fascinating to extend this research to people who don’t believe the diseases portrayed are communicable, and to animals that presumably don’t grasp germ theory.
It would be fascinating to extend this research to people who don’t believe the diseases portrayed are communicable, and to animals that presumably don’t grasp germ theory.
Reposted by Eliana Hadjiandreou
Life would be so different if only my brain understood the difference between being chased by a large predator and completing a small task that shouldn’t take much time at all
July 6, 2025 at 9:40 AM
Life would be so different if only my brain understood the difference between being chased by a large predator and completing a small task that shouldn’t take much time at all
Reposted by Eliana Hadjiandreou
Ducklings drop down into Lake Michigan through a hole in the concrete at Montrose Pier.
July 6, 2025 at 2:15 PM
Ducklings drop down into Lake Michigan through a hole in the concrete at Montrose Pier.
Reposted by Eliana Hadjiandreou
Our new paper is out. We point out that large brained (and often smart) mammals and birds have evolved very different distribution of neurons numbers in the brain.
This means that similar cognitive abilities have evolved in very different brains.
www.sciencedirect.com/science/arti...
This means that similar cognitive abilities have evolved in very different brains.
www.sciencedirect.com/science/arti...
April 17, 2025 at 9:22 PM
Our new paper is out. We point out that large brained (and often smart) mammals and birds have evolved very different distribution of neurons numbers in the brain.
This means that similar cognitive abilities have evolved in very different brains.
www.sciencedirect.com/science/arti...
This means that similar cognitive abilities have evolved in very different brains.
www.sciencedirect.com/science/arti...
Reposted by Eliana Hadjiandreou
Two heroic stray dogs rescued an injured dog from the middle of the road by dragging him to safety. The dog had been hit by a car and was stranded. Many cars passed by, but it was two stray dogs who pulled him off the road. The injured dog survived, and the stray dogs were rescued. 15/10 for both
April 3, 2025 at 10:23 PM
Two heroic stray dogs rescued an injured dog from the middle of the road by dragging him to safety. The dog had been hit by a car and was stranded. Many cars passed by, but it was two stray dogs who pulled him off the road. The injured dog survived, and the stray dogs were rescued. 15/10 for both
