Jan Engelmann
@janengelmann.bsky.social
Comparative and Developmental Psychologist at UC Berkeley and Director of the Social Origins Lab: https://socialoriginslab.com/
We also showed that chimpanzees respond appropriately to so-called “second-order evidence”—that is, evidence about evidence.
This indicates that chimpanzees explicitly represent what has been called the *evidential relation*: the causal connection between evidence and hypothesis. (6/8)
This indicates that chimpanzees explicitly represent what has been called the *evidential relation*: the causal connection between evidence and hypothesis. (6/8)
October 30, 2025 at 6:47 PM
We also showed that chimpanzees respond appropriately to so-called “second-order evidence”—that is, evidence about evidence.
This indicates that chimpanzees explicitly represent what has been called the *evidential relation*: the causal connection between evidence and hypothesis. (6/8)
This indicates that chimpanzees explicitly represent what has been called the *evidential relation*: the causal connection between evidence and hypothesis. (6/8)
Chimpanzees responded to the counterevidence in line with the rational predictions of a mathematical model of rational belief revision.
That is: they revised their prior belief when the counterevidence was stronger than the initial evidence, but maintained their belief otherwise (4/8)
That is: they revised their prior belief when the counterevidence was stronger than the initial evidence, but maintained their belief otherwise (4/8)
October 30, 2025 at 6:47 PM
Chimpanzees responded to the counterevidence in line with the rational predictions of a mathematical model of rational belief revision.
That is: they revised their prior belief when the counterevidence was stronger than the initial evidence, but maintained their belief otherwise (4/8)
That is: they revised their prior belief when the counterevidence was stronger than the initial evidence, but maintained their belief otherwise (4/8)
Chimpanzees participated in a foraging task. We first gave them evidence that food was in one location, and let them make a first choice. Then we presented them with *counterevidence*: evidence for the other location. (3/8)
October 30, 2025 at 6:47 PM
Chimpanzees participated in a foraging task. We first gave them evidence that food was in one location, and let them make a first choice. Then we presented them with *counterevidence*: evidence for the other location. (3/8)