@misc{indiciaecd7f79927102,
  title = {Programmed instruction and learner characteristics: preliminary data.},
  author = {R E Ripple and R O'Reilly and L Wightman and J Dacey},
  year = {1965},
  doi = {10.2466/pr0.1965.17.2.633},
  url = {https://pubmed.ncbi.nlm.nih.gov/5833749/},
  note = {Source identifier: 5833749}
}