@article{willis1986-3267404,
  author  = {Willis, S. L. and Schaie, K. W.},
  title   = {{Training the elderly on the ability factors of spatial orientation and inductive reasoning}},
  journal = {Psychology and aging},
  year    = {1986},
  doi     = {10.1037//0882-7974.1.3.239},
  pmid    = {3267404},
  url     = {https://doi.org/10.1037//0882-7974.1.3.239}
}