@misc{indiciae39ab552c1168,
  title = {Motivation, performance, and extinction.},
  author = {R W EARL},
  year = {1957},
  doi = {10.1037/h0042164},
  url = {https://pubmed.ncbi.nlm.nih.gov/13463159/},
  note = {Source identifier: 13463159}
}