What is the calculation for Exact Count per Interval IOA?

The calculation for Exact Count per Interval Interobserver Agreement (IOA) is correctly identified as taking the number of intervals with agreement and dividing it by the total number of intervals, then multiplying that result by 100% to express it as a percentage. This method specifically assesses the degree of consistency between two or more observers in capturing the same event occurrences within designated intervals.

Exact Count per Interval is particularly important in behavior analysis, as it provides a clear metric to evaluate the reliability of data collected by different observers. When two observers are recording the same behavior, this calculation helps ensure that the data is reliable and valid, indicating that both observers are in agreement regarding the exact number of occurrences within each interval.

The other options do not accurately reflect the specific requirements for calculating Exact Count per Interval IOA. The sum of similar counts divided by the number of intervals does not account for agreement but rather focuses on totals, which isn't specific enough for precise measurement. Dividing both observers' total counts by their individual counts doesn't yield the necessary information about agreement, and counting instances divided by the observation period lacks the critical aspect of examining intervals for agreement.