Attrition (research)

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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.

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

• 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.