What is the formula for calculating scored interval interobserver agreement (IOA)?

The formula for calculating scored interval interobserver agreement (IOA) is based on determining the proportion of intervals where observers agree that the behavior occurred. The correct answer focuses on the relationship between the number of intervals where there was agreement regarding the occurrence of a behavior and the total number of intervals in which the behavior occurred.

By dividing the number of intervals where there was an agreement on the occurrence of the behavior by the total number of intervals where the behavior was recorded, and then multiplying by 100, you arrive at a percentage that reflects the level of agreement. This percentage is crucial in assessing the reliability of data collected by different observers, ensuring that their observations align when identifying the presence of the behavior.

The other options, while related to observation and data collection, either focus on different aspects of data analysis or use formulas that do not accurately assess scored interval IOA. For instance, some focus on non-occurrences or use different denominators that do not fit the definition of scored interval agreements. Understanding the correct formula is essential for those working with behavioral assessments and ensuring the accuracy of observation data.