Internal consistency reliability is demonstrated when...

Internal consistency reliability is demonstrated when...

• A. Similar questions on the same test are answered in the same way
• B. The test correlates with external criteria
• C. The test yields identical results on any given day
• D. Raters agree exactly

Answer: (A)

Internal consistency reliability asks whether the items on a test that are intended to measure the same construct pull in the same direction. When a measure has good internal consistency, responses to different but related items correlate with each other, so someone who endorses one item closely tends to endorse others as well. That cohesive pattern across items is exactly what is described by “similar questions on the same test are answered in the same way.” It shows the test items are all tapping the same underlying attribute and not mixing in unrelated content. Briefly contrasting the other ideas: validity involves how well a test relates to external criteria, not how its items hang together; test-retest reliability looks at stability of scores over time rather than coherence among items; inter-rater reliability concerns consistency between different scorers rather than how items relate to one another.

Internal consistency reliability asks whether the items on a test that are intended to measure the same construct pull in the same direction. When a measure has good internal consistency, responses to different but related items correlate with each other, so someone who endorses one item closely tends to endorse others as well. That cohesive pattern across items is exactly what is described by “similar questions on the same test are answered in the same way.” It shows the test items are all tapping the same underlying attribute and not mixing in unrelated content.

Briefly contrasting the other ideas: validity involves how well a test relates to external criteria, not how its items hang together; test-retest reliability looks at stability of scores over time rather than coherence among items; inter-rater reliability concerns consistency between different scorers rather than how items relate to one another.