@misc{indiciae83af6ed3424e,
  title = {Estimation of effective stimuli in probability learning},
  author = {Harrington, R. T. and Hartley, R. E. and Taylor, J. L. and Williams, C. D.},
  year = {1970},
  url = {https://ntrs.nasa.gov/citations/19710039078},
  note = {Source identifier: 19710039078}
}