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Interval Behavior Observation and Data Collection


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Using the Interval Observation
Interval Behavior Observation and Data Collection

A model of the Interval Data Collection Form


Prepare for Data Collection

  1. Once your form is created, be sure to record date and time of observation.
  2. 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.
  3. Keep an eye on your timing instrument to keep track of the intervals.
  4. During each time interval look to see if the behavior occurs.
  5. 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.
  6. 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.

A free printable pdf Interval Observation Form

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