@misc{indiciae393d0cbf5fc0,
  title = {Adaptation to level of difficulty in intelligence testing.},
  author = {A W HEIM},
  year = {1955},
  doi = {10.1111/j.2044-8295.1955.tb00541.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/13250159/},
  note = {Source identifier: 13250159}
}