Alternate forms reliability is also known as parallel forms reliability and assesses consistency of measurements obtained with different forms of a test.

• A. Internal consistency
• B. Alternate forms reliability
• C. Intrarater reliability
• D. Test-retest reliability

Answer: (B)

Alternate forms reliability checks consistency of scores across different versions of the same test. The idea is that each form is designed to be equivalent in content and difficulty, so a person should receive similar scores on form A and form B if the construct being measured hasn’t changed. This is why it’s also known as parallel forms reliability. This differs from internal consistency, which looks at how well the items on a single form hang together; intrarater reliability, which examines whether the same rater scores consistently; and test-retest reliability, which looks at score stability over time using the same form. Therefore, assessing how well different forms yield comparable results identifies alternate forms reliability.