Bla ordlisten:
Fair tests of treatments are evaluations designed to minimize the risk of being misled by systematic errors (biases), or the play of chance. We refer to these as “fair comparisons” to avoid confusion with diagnostic tests, and to emphasize that fair tests of treatments always involve a comparison with some other treatment (or withholding a treatment).
bias · play of chance · study · treatment comparison
If you feel that this definition hasn't helped you to understand the term, click on our monkey to let us know.