Attrition (research)

Ratios regarding the loss of participants during an experiment

For other uses, see Attrition (disambiguation).

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In science, attrition are ratios regarding the loss of participants during an experiment. Attrition rates are values that indicate the participant drop out. Higher attrition rates are found in longitudinal studies.

## See also

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* Intention-to-treat analysis
* Selection bias § Attrition

## Further reading

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* Fitzgerald, John; Gottschalk, Peter; Moffitt, Robert (1998). "An Analysis of Sample Attrition in Panel Data: The Michigan Panel Study of Income Dynamics" (PDF). Journal of Human Resources. 33 (2): 251–299\. doi:10.2307/146433. JSTOR 146433.
* Wooldridge, Jeffrey M. (2010). Econometric Analysis of Cross Section and Panel Data. Cambridge: MIT Press. pp. 837–842\. ISBN 9780262296793.