1. the lessening or weakening in strength, value, or quality of a stimulus or other factor, for example, a medication acting on symptoms. 2. in statistics, a reduction in the estimated effect size because of errors of measurement.
1. the lessening or weakening in strength, value, or quality of a stimulus or other factor, for example, a medication acting on symptoms. 2. in statistics, a reduction in the estimated effect size because of errors of measurement.