To calculate occurrence (i. e., scored interval) interobserver agreement, divide the:

Number of intervals in which no occurrence was reported for both observers by the number of intervals in which no occurrence was recorded by at least one observer (x 100)

Step-by-step explanation:

To calculate occurrence, the formula to be used is The Number of intervals in which at both observers recorded no occurrence, divided by the number of intervals in which at least one observer recorded no occurrence (x 100).

This would give us the accurate answer for occurrence.

ou would have 12 of each