If you want to know if the items on a test assess one and only one dimension,what type of reliability do you use?
A)parallel forms reliability
B)test-retest reliability
C)interrater reliability
D)internal consistency reliability

Question

Quizplus · Accepted Answer

Internal consistency reliability is used to determine if the items on a test assess one and only one dimension. This is done by examining the correlation between the items on the test. If the items are highly correlated, it suggests that they are measuring the same construct and have internal consistency. This is different from parallel forms reliability, which is used to determine if two tests are equivalent, and test-retest reliability, which is used to determine if a test produces consistent results over time. Interrater reliability is used to determine if different raters or observers produce consistent ratings or observations.

If You Want to Know If the Items on a Test