@misc{indiciaee6624979dd90,
  title = {Processing demands, effort, and individual differences in four different vigilance tasks.},
  author = {H S Koelega and J A Brinkman and L Hendriks and M N Verbaten},
  year = {1989},
  doi = {10.1177/001872088903100104},
  url = {https://pubmed.ncbi.nlm.nih.gov/2707818/},
  note = {Source identifier: 2707818}
}