In science, attrition are
ratios
In mathematics, a ratio shows how many times one number contains another. For example, if there are eight oranges and six lemons in a bowl of fruit, then the ratio of oranges to lemons is eight to six (that is, 8:6, which is equivalent to the ...
regarding the loss of participants during an
experiment
An experiment is a procedure carried out to support or refute a hypothesis, or determine the efficacy or likelihood of something previously untried. Experiments provide insight into Causality, cause-and-effect by demonstrating what outcome oc ...
. Attrition rates are values that indicate the participant drop out. Higher attrition rates are found in
longitudinal studies
A longitudinal study (or longitudinal survey, or panel study) is a research design that involves repeated observations of the same variables (e.g., people) over short or long periods of time (i.e., uses longitudinal data). It is often a type of obs ...
.
See also
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Intention-to-treat analysis
In medicine an intention-to-treat (ITT) analysis of the results of a randomized controlled trial is based on the initial treatment assignment and not on the treatment eventually received. ITT analysis is intended to avoid various misleading artifac ...
*
Selection bias#Attrition
Further reading
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* {{cite book , first=Jeffrey M. , last=Wooldridge , title=Econometric Analysis of Cross Section and Panel Data , location=Cambridge , publisher=MIT Press , year=2010 , pages=837–842 , url=https://books.google.com/books?id=hSs3AgAAQBAJ&pg=PA837 , isbn=9780262296793
Experiments