This study provide an analysis and evaluation of composite variables in National Education Longitudinal Study of 1988 (NELS:88) and School and Staffing Survey(SASS). The study has provided ways of understanding the contributions made by individual survey items through an appraisal of the contributions they make to composite measures of which they are a part. It also shown how composite variables may provide more reliable measures of the concepts of interest than do individual survey items, and how they may permit the more effective summerization and communication of survey results.
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