The experimental design depends on the objectives of the study. It should be planned in detail, including the development of written protocols and consideration of the statistical

methods to be used, before starting work. In principle, a well-designed experiment avoids bias and is sufficiently powerful to be able to detect effects likely to be of biological importance. It should not be so complicated that mistakes are made in its execution. Virtually all animal experiments should be done using one of several formal designs that can be found in literature and used in our Experimental Design Studio.