If items from a test are measuring the same trait,estimates of reliability yielded from split-half methods will typically be ________ as compared to estimates from KR-20.
A) higher
B) lower
C) similar
D) approximately the same

Question

Quizplus · Accepted Answer

Split-half methods are based on splitting the test into two halves, which can result in a lower estimate of reliability due to potential differences between the two halves. KR-20, on the other hand, is based on the correlation between all items in the test and can provide a higher estimate of reliability if the items are measuring the same trait. Therefore, the estimate of reliability from split-half methods is typically lower than from KR-20.

If Items from a Test Are Measuring the Same Trait,estimates