Theoretically, reliability is
A)the correlation of the observed test score with the true score.
B)the square root of the ratio of true to the observed score.
C)the ratio of true to the observed score squared.
D)not possible to define.

Question

Quizplus · Accepted Answer

Reliability in the context of testing and measurement refers to the consistency of a test score or measurement. Theoretically, it is conceptualized as the correlation between the observed test scores and the true scores, where the true score represents the actual attribute or ability being measured, free from any measurement errors.

Theoretically, Reliability Is