A common tool in special education, applied behavior analysis (ABA), and general classroom management to identify behavior patterns and create proactive strategies for both undesirable and desired actions utilizing the ABC Method – Antecedent-Behavior-Consequence.
Antecedent-Behavior-Consequence (ABC) Model: The claim is this model helps understand the context of a behavior by looking at what happens before (“A” = antecedent), the “B” behavior itself, and what happens after (“C” = consequence). It’s utilized to identify triggers and consequences that influence behavior in therapy and classroom settings.
Traditional Antecedent, Behavior, Consequence (ABC) models, especially those relying on external rewards and punishments, often backfire for PDA because they increase the underlying anxiety and perception of demands, triggering stronger avoidance. The more demands, the lower the threshold of tolerance the PDA individual has, and the more “bad behavior” you are likely to see. PDA individuals have fluctuating capacity and stress is cumulative. We often talk about the window of tolerance with PDA individuals. The window of tolerance is a concept originally developed by Dr. Dan Siegel, MD to describe the optimal zone of “arousal” for a person to function in everyday life. When a person is operating within this zone or window, they can effectively manage and cope with their emotions.
When we see “bad behaviors” from PDAers, it’s generally due to having a very low threshold for tolerance. It’s so important to look at behavior as communication, not disobedience with PDA individuals. Generally speaking, most “bad behavior” from PDAers, especially young children, is due to having a very narrow window of tolerance due to compounded demands throughout a period of time – not from an immediate antecedent. Looking at what happened just before the behavior will not give you the data you are seeking. It will only give you a very thin slice of information from a moment in time, and not the actual reason the behavior is happening.
PDA individuals are not acting out because they are defiant or disobedient. Their nervous systems are much more fragile than a neurotypical individual and they are so easily tipped into a threat response (fight, flight, freeze and often fawn, especially for more internalized PDAers). The more fragile their nervous systems become, the more threat is perceived, and the more behavioral responses you will see. The ABC model fails with PDAers because it treats an anxiety-driven survival response as a “disobedient” behavior, and is looking for an immediate cause of the behavior, instead of looking upstream.
Because most behavior from a PDA child is a threat response, it’s crucial to look upstream to better understand the function of the behavior. If you want to know why, look at the day they’ve had. What happened before they go to school. What happened the day/week prior? Have they experienced high levels of stress lately? Is it close to a holiday or just after a holiday (very high stress/high demand/low autonomy periods for PDAers)?
Why the ABC Method doesn’t work for PDAers:
- It Treats Survival as Defiance: Traditional behavior plans assume the person is knowingly misbehaving and needs to learn better behavior. For PDAers, the behavior is a panic response (fight, flight, freeze, or fawn) to pressure, which cannot be “unlearned” with consequences.
- Consequences Increase Anxiety: When a PDAer is already in a high-anxiety, “downstairs brain” state, enforcing consequences for non-compliance increases their sense of threat. This increases stress/anxiety and escalates the demand avoidance rather than reducing it.
- It Triggers Further Resistance: At the core, PDAers need to feel a strong sense of autonomy and in control of their environment and the circumstances around them. Using rewards or consequences feels like an attempt to enforce a hierarchy and take away their autonomy, which triggers more resistance.
- Misunderstanding the “Why”: The ABC method focuses on changing the behavior, but it ignores the underlying need for control. Even when PDAers understand social rules, their nervous system prevents them from accessing “correct” behavior in the moment.
- Rewards Can Backfire: Using rewards can turn enjoyable, low-demand activities into high-pressure tasks, reducing intrinsic motivation and increasing pressure.
Key things to remember for people working with (or parenting) PDA individuals:
- For PDAers, demands (even praise or rewards) feel like a loss of control, triggering a fight/flight response, not a choice.
- Rewards Backfire: Sticker charts or praise can become perceived as another demand, adding pressure and increasing stress, not reducing it.
- Dysregulation: When overwhelmed (dysregulated), the “will” isn’t in charge; it’s an anxiety or threat response, making consequences ineffective.
What Works Better (Adapted Approaches):
- Build Relationships: Trust and connection are fundamental.
- Focus on Anxiety Reduction: The goal is to lower the perceived threat, not force compliance.
- Choice & Assent: Offer choices to give a sense of control (e.g., “Do you want to do math or reading first?”).
- Use Declarative Language: Use descriptive language instead of commands (e.g., “I wonder if we need to get our shoes on now?”).
- Use humor and play to redirect or distract using imagination.
- Reduce Demands: Prioritize what’s essential and let go of less important demands.
Therapists, educators and parents should focus on strategies that build trust, respect their autonomy, treat them as an equal, offer choices, use humor, reduce demands, and validate their feelings. By using these strategies, you will increase their threshold for tolerance and ultimately have a much happier and relaxed PDAer.
