Definition:
In preparing a functional behavior analysis, special educators, behavior specialists and psychologists use an acronym, ABC, to understand a target behavior. The A stands for antecedent, the B for behavior and the C for consequence.
Antecedent in this specific context, means the setting events and environment.
- Where does the target behavior occur?
- When does the target behavior occur?
- Who is present when the target behavior occurs?
- Does something happen just before the target behavior?
All of these things may contribute to the "setting event" or antecedent to the event.
Also Known As: Setting Event
Examples:
Antecedent In the morning upon arrival, when presented with her work folder, (antecedent) Sonia throws herself out of her wheelchair. (behavior.)

