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Instrument Reliability and Validity Guide

This video covers instrument reliability and validity — two critical concepts for evaluating measurement tools in health education research.

Read the study guide article for this lesson →

What's Covered

  • Types of reliability: test-retest, inter-rater, internal consistency (Cronbach's alpha)
  • Types of validity: content, criterion (predictive and concurrent), construct
  • The relationship between reliability and validity
  • How to assess and improve instrument quality
  • Key exam formulas and concepts for reliability and validity