The effect of a 'don't know' option on test scores: number-right and formula scoring compared.

@article{Muijtjens1999TheEO,
  title={The effect of a 'don't know' option on test scores: number-right and formula scoring compared.},
  author={A. M. M. Muijtjens and Henk van Mameren and R J I Hoogenboom and Johannes L. H. Evers and Cees P. M. van der Vleuten},
  journal={Medical education},
  year={1999},
  volume={33 4},
  pages={267-75}
}
OBJECTIVES In multiple-choice tests using a 'don't-know' option the number of correct minus incorrect answers was used as the test score (formula scoring) in order to reduce the measurement error resulting from random guessing. In the literature diverging results are reported when comparing formula scoring and number-right scoring, the scoring method… CONTINUE READING

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