Examlex
The quantity 10-9 (one billionth) is designated by the prefix
Reverse Control Groups
An experimental design element where the groups are reversed to check the effect of the independent variable in a new set of conditions or with different subjects.
Experimenter Bias
A form of bias introduced by the experimenter whose expectations about the outcome of the experiment can be subtly communicated to the participants.
Subject Bias
A form of bias introduced into scientific or experimental research by participants' expectations, treatment, or response to the knowledge that they are being observed.
Sampling Effect
A statistical effect in which the observed variability is not representative of the underlying population due to the sample size or method of selection.
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