A Reliability Coefficient (R) and a Standard Error of Measurement

question 8

Multiple Choice

A reliability coefficient (r) and a standard error of measurement (SEM) were computed on a test with 10 items.What would happen to those statistics if the test were increased to forty items?

• A)r would decrease, SEM would increase.
• B)r would decrease, SEM would stay the same.
• C)r would increase, SEM would decrease.
• D)r would increase, SEM would stay the same.

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