The sample size relates to the number of experimental units in each group at the start of the study, and is usually represented by n (see item 1 – Study design for further guidance on identifying and reporting experimental units). This information is crucial to assess the validity of the statistical model and the robustness of the experimental results.
For each experiment, provide brief details of study design including:
Within a design, biological and technical factors will often be organised hierarchically, such as cells within animals and mitochondria within cells, or cages within rooms and animals within cages. Such hierarchies can make determining the sample size difficult (is it the number of animals, cells or mitochondria?).
For each experiment, provide brief details of study design including:
For each experiment, provide brief details of study design including:
The choice of control or comparator group is dependent on the experimental objective. Negative controls are used to determine if a difference between groups is caused by the intervention (e.g. wild-type animals vs genetically modified animals, placebo vs active treatment, sham surgery vs. surgical intervention).
For each experiment, provide brief details of study design including:
The freely available compliance checker will use natural language processing to automatically assess scientific manuscripts for the information in the ARRIVE Essential 10, a checklist of the most important details to include in any publication describing animal research.