Tangential: positive controls are common in e.g. biology experiments, where the efficacy of the experiment to detect an actual effect can be in doubt. (This won’t be the case in treating depression, where successful treatment can be detected by asking the patient.)
Tangential: positive controls are common in e.g. biology experiments, where the efficacy of the experiment to detect an actual effect can be in doubt. (This won’t be the case in treating depression, where successful treatment can be detected by asking the patient.)