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Ingels, Steven J. – 1991
Some students are excluded from the National Education Longitudinal Study of 1988 (NELS:88) because of an inability, whether due to physical, mental, or linguistic barriers, to participate in studies requiring questionnaire or cognitive test completion. The implications of this exclusion for sample representativeness, national estimation, and…
Descriptors: Cognitive Tests, Data Collection, Disqualification, Eligibility


