The correlation between the odd and even numbered items for a given test underestimates the test's reliability unless corrected for by a technique such as the Spearman-Brown prophecy formula.

Question

Quizplus · Accepted Answer

This statement is true. The correlation between odd and even numbered items for a test tends to underestimate the test's reliability because odd and even numbered items may not measure the same underlying construct or skill. The Spearman-Brown prophecy formula can be used to correct for this underestimation.

The Correlation Between the Odd and Even Numbered Items for a Given