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Basics of Classical Test Theory

2 2 2 2 2 2 T T XT X T E σ σ ρ σ σ σ = = + CTT: Reliability Index Reliability can be viewed as a measure of consistency or how well as test “holds together” Reliability is measured on a scale of 0-1. The greater the number the higher the reliability.

  Basics, Tests, Theory, Classical, 2 2 2 2 2 2, Basics of classical test theory