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@Article{PhysRevSTPER.4.010102,
  title = {Measuring student learning with item response theory},
  author = {Lee, Young-Jin  and Palazzo, David J. and Warnakulasooriya, Rasil  and Pritchard, David E.},
  journal = {Phys. Rev. ST Phys. Educ. Res.},
  volume = {4},
  number = {1},
  pages = {010102},
  numpages = {6},
  year = {2008},
  month = {Jan},
  doi = {10.1103/PhysRevSTPER.4.010102},
  publisher = {American Physical Society}
}