Discusses classical test theory, including test construction, administration, and use. Covers basic statistical concepts in measurement, reliability, and validity; principles of sound test construction and item analysis; test administration and scoring; procedures for transforming raw test data into scaled scores; and future prospects in test…

Provides a brief overview of validity and reliability as concepts related to the overall quality of test instruments. Describes the nature and interpretation of content, face, criterion, and construct validity and identifies several approaches for measurement and improvement of reliability. (Author/CS)

Presented at the Annual National Council on Measurement in Education (NCME) in New York in March 2008. This presentation explores how different item weighting can affect the effective weights, validity coefficents and test reliability of composite scores among test takers.