@misc{indiciaee5ef9102adeb,
  title = {Persistence at a difficult task with alternative task of intermediate difficulty.},
  author = {N T FEATHER},
  year = {1963},
  doi = {10.1037/h0044576},
  url = {https://pubmed.ncbi.nlm.nih.gov/13944644/},
  note = {Source identifier: 13944644}
}