@misc{indiciaecd646e9ec8d1,
  title = {The partial reinforcement effect in a vigilance task},
  author = {Hagner, G. L. and Meyer, D. and Warm, J. S.},
  year = {1971},
  url = {https://ntrs.nasa.gov/citations/19710052983},
  note = {Source identifier: 19710052983}
}