Which term describes the degree to which two or more independent observers report the same observed values after measuring the same events?

• A. Interobserver Agreement
• B. IRT
• C. Limited Hold
• D. Magnitude

Answer: (A)

Interobserver agreement describes the degree to which two or more independent observers report the same observed values after measuring the same events. This reliability check is essential in ABA data collection because it helps confirm that observations reflect what actually occurred and aren’t biased by a single observer. When observers independently record the same events in the same way, IOA is high; when their records differ, IOA is low and data collection methods may need adjustments, such as clearer definitions or better training. The other terms don’t fit this idea: IRT is item response theory, a psychometric concept; Limited Hold refers to a procedural constraint on reinforcement timing; Magnitude concerns the size or intensity of a stimulus or response.