@misc{indiciaebbf4422075ca,
  title = {Extra-task performance as a measure of learning a primary task.},
  author = {H P BAHRICK and M NOBLE and P M FITTS},
  year = {1954},
  doi = {10.1037/h0059267},
  url = {https://pubmed.ncbi.nlm.nih.gov/13211942/},
  note = {Source identifier: 13211942}
}