@article{wasthatsohardestimatinghuman,
  title = {Was that so hard? Estimating human classification difficulty},
  author = {Morten Rieger Hannemose and Josefine Vilsbøll Sundgaard and Niels Kvorning Ternov and Rasmus R. Paulsen and Anders Nymark Christensen},
  year = {2022},
  eprint = {2203.11824},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2203.11824v1},
}