@misc{indiciaeca40973413ee,
  title = {Task difficulty and personality test validity.},
  author = {M D Hakel},
  year = {1968},
  doi = {10.2466/pr0.1968.22.2.502},
  url = {https://pubmed.ncbi.nlm.nih.gov/5650245/},
  note = {Source identifier: 5650245}
}