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Attrition (Research Studies)

Scope Note: 
Reduction in size of the population sample during the period of time covered by a longitudinal study (Note: Do not confuse with "Student Attrition")
Category: Research and Theory
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Use this term instead of
Mortality (Research Studies)
Related Terms
Control Groups
Dropouts
Experimental Groups
Longitudinal Studies
Matched Groups
Research
Research Design
Research Methodology
Research Problems
Sample Size
Sampling
Statistical Bias
Added to ERIC: 6/23/1977