If the variance of either variable is restricted by the sampling procedures used,then the magnitude of the coefficient of reliability will be
A) lowered.
B) raised.
C) unaffected.
D) affected only in tests with a true-false format.

Question

Quizplus · Accepted Answer

The coefficient of reliability measures the consistency or stability of scores on a particular test or measure. If the variance of either variable is restricted by the sampling procedures used, it means that there is less variability in the data, and this can lead to lower reliability coefficients. This is because the coefficient of reliability is influenced by the ratio of true score variance to the total variance, and less variability in the data means that the true score variance is smaller relative to the total variance. Therefore, the magnitude of the coefficient of reliability will be lowered if the variance of either variable is restricted.

If the Variance of Either Variable Is Restricted by the Sampling