Nugroho, D. A. A., Kusrohmaniah, S., Pilz, E. et al. 2024. No evidence tube entrapment distresses rodents in typical empathy tests. Animal Cognition 27(1), 29.
In the first two experiments an empty tube open at one end was placed in different locations. Male hamsters, tested one at a time, tended to stay close to the tube or in it. During...