2 Antecedent Interventions

Start with the likely function

Antecedent interventions change events or conditions before a behavior occurs. Their aim is to make challenging behavior less necessary and desired behavior easier. The strategy should fit a reasonable hypothesis about the behavior’s function: what the behavior helps the person obtain or avoid.

A functional behavioral assessment can help identify relevant patterns. These patterns are starting hypotheses, not diagnoses, because similar behavior can have different functions for different people. Monitor what happens before and after behavior, and revise the plan if the strategy does not fit.

Match supports to behavior patterns

Use the observed pattern to guide a tentative hypothesis and select a change that addresses it.

• Escape or delay: If a student leaves the table when lengthy writing begins, consider breaking work into smaller parts, offering a choice of response method or task order, and teaching a request for help or a brief break.

• Attention: If a student calls out while the teacher helps someone else, consider predictable check-ins, a clear appropriate way to get attention, and teaching the student to request attention.

• Access to an item or activity: If a student grabs a tablet when it is unavailable, consider a visual schedule or clear cue for when it will be available, and teach the student to ask for it or ask when it will be available.

• Sensory or automatic effects: If a student leaves a noisy room or repeatedly seeks movement, adjust the environment when feasible—for example, reduce noise or provide an appropriate movement option—and teach a request for a quieter space or movement break.

Adjust the setting and offer choices

Change the physical or instructional setting to prevent predictable difficulty and support success. Possible adjustments include seating, distractions, visual schedules or timers, access to materials, task size, and response method.

For example, a quieter work area may address a noise-related trigger when a student leaves. If leaving occurs when a preferred activity ends, a visual schedule can make the next opportunity clearer.

Offer a small number of genuine choices while keeping the essential expectation clear. A student might choose, “Would you like to type or write?” or “Would you rather start with reading or math?” Choice can be useful around nonpreferred or difficult tasks because it gives the learner some control without removing the task. Do not offer options that are not actually available.

Use an easy-to-difficult request sequence

A high-probability sequence places a few brief, familiar requests that the learner is likely to follow immediately before a more difficult request. For example: “Hand me the pencil,” “Point to your name,” and “Open your notebook,” followed by “Start the first problem.” Keep the easy requests simple and genuine, then present the target request calmly.

This strategy may support participation when difficulty following instructions is the concern. It does not replace teaching, adapting the task, or investigating why the target task is difficult.

Teach an appropriate request

Teach a quick, understandable way for the learner to request the same outcome that challenging behavior may produce. Depending on the learner, the request might use speech, a sign, a gesture, a picture card, or an AAC device. Examples include “Help” for assistance, “Break” for a brief pause, “Talk with me” for attention, and “Can I have the tablet?” for an item.

Practice and prompt the request before predictable difficult moments, and arrange for appropriate requests to receive a timely, useful response. Functional communication training (FCT) teaches a replacement communication response that accesses the same kind of reinforcement as the behavior it is meant to replace.

Practice, observe, and adjust

1. Describe the pattern: Identify what happens just before the behavior and what tends to happen afterward.

2. State a tentative function: For example, when independent writing begins, a student may be trying to escape a task that feels too difficult.

3. Choose a matching change: Break the task into manageable steps, offer a choice of response method, and teach a request for help or a break.

4. Try the plan consistently and observe: Track whether the behavior changes and whether the learner uses the alternative strategy. Adjust with the relevant educational or behavioral team if needed.

For a learner who leaves during long written assignments, simply changing the seat may not address the likely escape function. Shorter work chunks, an option to type, and a taught request for help or a break are more directly matched to that pattern. Antecedent supports should be individualized and reviewed for effectiveness.