If you are doing a study on lab rats, you would expect there to be the same number of rats at the end of the study as there were when you started it. However, that is not always the case. Researchers have found that in some scientific papers the number of mice or rats in the study shrank by the end of the study. The reason for this is attrition, which means the rat or mouse died due to illness or became difficult to study. It’s not uncommon for lab rat numbers to shrink at the conclusion of studies.





Rodents That Go Missing in Scientific Papers Can Skew Results

A group of researchers noticed something strange in certain scientific papers involving small rodents (likerats or mice): the number of animals reported at the start of an experiment often did not match the number of animals at the end. This can have …

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