What could a test developer do to increase internal consistency of a test?
A) accurately measure the test-retest reliability of the test
B) add well-written questions to each test form
C) add questions that measure the same concept
D) adjust the reliability coefficient using the KR-20 formula

Question

Quizplus · Accepted Answer

Internal consistency refers to the degree to which different items on a test measure the same construct or concept. By adding questions that measure the same concept, a test developer can increase the internal consistency of the test. Option A refers to test-retest reliability, which is a separate concept. Option B may improve the test's overall quality, but it does not specifically address internal consistency. Option D refers to adjusting the reliability coefficient using the KR-20 formula, which is a statistical technique used to estimate internal consistency, but not a method for improving it.

What Could a Test Developer Do to Increase Internal Consistency