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.

Question

Quizplus · Accepted Answer

The Answer is C

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