Defined Behaviors targeted for reduction as well as those targeted for increase must be Measurable and observable. All Behaviors in a student's Behavior Intervention Plan must have a clearly defined baseline.
Types of Measurement used for monitoring of Behavior Intervention Plans
Frequency/Rate
Opportunity Based Data
Duration
Time Sample
Interobserver Agreement (IOA) refers to the degree to which two or more independent observers report the same observed values after measuring the same events.
Here are some calculators that allow us to quickly measure differences in various types of IOA
IOA Formulas from ABAI
Calculating IOA in Excel -Journal article