Related Experiment Video
Updated: Aug 10, 2026

Universal Screening for Prevention of Reading, Writing, and Math Disabilities in Spanish
Published on: July 18, 2020
Principles of screening
Mark I Evans1, Robert S Galen, David W Britt
1Comprehensive Genetics, Mt. Sinai School of Medicine, New York, NY 10021, USA. Evans@CompreGen.com
Abstract:
Screening and diagnostic testing are sequentially-oriented procedures for progressively analyzing risk. Screening is broadly based and aimed at identifying those at high risk of a disease or condition. Diagnostic testing is designed to more definitively answer the question of whether or not a person has a disease or condition. Understanding the differences among four key measures of evaluation for tests (sensitivity, specificity, positive predictive value and negative predictive value) are necessary for proper utilization of screening tests.
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