Prepare for Data Collection
- Once your form is created, be sure to record date and time of observation.
- Make sure that you have your timing instrument available prior to beginning your observation, be sure it is appropriate for the interval you have chosen. A stop watch is best for minute intervals.
- Keep an eye on your timing instrument to keep track of the intervals.
- During each time interval look to see if the behavior occurs.
- Once the behavior occurs, place a checkmark (√) for that intervalIf, at the end of the interval the behavior did not occur, place a zero (0) for that interval.
- At the end of your observation time, total the number of checkmarks. Find the percentage by dividing the number of check marks by the total number of intervals. In our example, 4 intervals out of a 20 interval observations would be 20%, or "The target behavior appeared in 20 percent of observed intervals."
Behavior IEP Goals that Would Use Interval Observation.
- In a classroom, Alex will reduce the incidence of off task behaviors (tongue clicking, hand flapping, and rocking) to 20% of observed intervals in three out of four consecutive one hour observations as recorded by classroom staff.
- In the general education classroom Melissa will remain in her seat in 80% of observed intervals in three out of four consecutive one hour observations taken during instructional time by classroom staff.