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<title>Extinction Burst in ABA Therapy: Why Behavior Gets Worse When Reinforcement Stops | Examples, How Long It Lasts, Red Flags | Achieving Stars Therapy</title>
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<div class=gx><div class="hero hp"><input type=checkbox id=hpp class=hp-chk aria-label="Pause the hero photos"><label for=hpp class=hp-pause></label><div class=hp-reel aria-hidden=true><img class=s1 src="https://cdn.prod.website-files.com/65f21a701f9e963fc14601d3/6ad3cf9cfecd9509bc32220c_burst-h1-1400.webp" srcset="https://cdn.prod.website-files.com/65f21a701f9e963fc14601d3/6ad3cfaaf233fcffff8c90ae_burst-h1-700.webp 700w,https://cdn.prod.website-files.com/65f21a701f9e963fc14601d3/6ad3cf9cfecd9509bc32220c_burst-h1-1400.webp 1400w" sizes=100vw alt="" fetchpriority=high><img class=s2 src="https://cdn.prod.website-files.com/65f21a701f9e963fc14601d3/6ad3cfae17a64da0084b3dc5_burst-h2-1400.webp" srcset="https://cdn.prod.website-files.com/65f21a701f9e963fc14601d3/6ad3cfb17fd6a69c04778638_burst-h2-700.webp 700w,https://cdn.prod.website-files.com/65f21a701f9e963fc14601d3/6ad3cfae17a64da0084b3dc5_burst-h2-1400.webp 1400w" sizes=100vw alt="" loading=lazy><img class=s3 src="https://cdn.prod.website-files.com/65f21a701f9e963fc14601d3/6ad3cfb53242361aee25801a_burst-h3-1400.webp" srcset="https://cdn.prod.website-files.com/65f21a701f9e963fc14601d3/6ad3cfba35625e0d5314781e_burst-h3-700.webp 700w,https://cdn.prod.website-files.com/65f21a701f9e963fc14601d3/6ad3cfb53242361aee25801a_burst-h3-1400.webp 1400w" sizes=100vw alt="" loading=lazy></div><div class=hero-inner><span class=location-badge>ABA Parent Guide</span><h1>Extinction Burst in ABA: Why Behavior Got Worse, and When It Is Something Else</h1><p>A short spike when a behavior stops working. It shows up in about 1 in 4 cases, not most.</p></div></div>
<div class=quick-info><div class=info-item><div class=info-label>What It Is</div><div class=info-value>A short spike when the payoff stops</div></div><div class=info-item><div class=info-label>How Often</div><div class=info-value>About 1 in 4 cases</div></div><div class=info-item><div class=info-label>How Long</div><div class=info-value>No fixed timeline</div></div><div class=info-item><div class=info-label>Less Likely When</div><div class=info-value>A new skill is taught too</div></div><div class=info-item><div class=info-label>Red Flags</div><div class=info-value>New behavior, injury, fear</div></div><div class=info-item><div class=info-label>You Are Owed</div><div class=info-value>A written plan and reviews</div></div></div>
<div class=content>
<section><p>Parents notice it fast. A few weeks into therapy, the screaming is louder or the hitting is more frequent. On r/ABA in July 2026 a parent asked, <a href="https://www.reddit.com/r/ABA/comments/1ulp6ew/is_it_worth_continuing_aba_when_thats_not_what_we/" rel="nofollow noopener" target=_blank>"Is it worth continuing ABA when that's not what we originally signed up for?"</a> In September another wrote a post titled "the ABA system has failed my son."</p>
<p>Sometimes the answer is an extinction burst. Sometimes it is not. This page shows how to tell the difference, using the research and the code of ethics every board certified behavior analyst has to follow.</p>
<div class=highlight-box><p><strong>The short version.</strong> A burst is the same behavior, briefly stronger, right after the team stops letting it pay off. It is a known effect but not the usual one: two reviews found it in 24% of cases. It shows up less when the child is taught a replacement skill at the same time. Anything new, dangerous, or frightening for your child is a reason to call the BCBA now, not to wait it out.</p></div></section>
<nav class=toc><b>On this page</b><ol><li><a href=#what>What it is</a></li><li><a href=#examples>Examples</a></li><li><a href=#often>How often it happens</a></li><li><a href=#long>How long it lasts</a></li><li><a href=#else>Burst or something else</a></li><li><a href=#good>What a good team does</a></li><li><a href=#ask>Questions to ask</a></li><li><a href=#stop>When to stop or switch</a></li></ol></nav>
<section id=what><h2>Understanding extinction bursts: what extinction in ABA means</h2>
<p>Start with reinforcement. Reinforcement is whatever happens after a behavior that makes it more likely to happen again, like attention, a snack, or a task going away. Extinction in ABA means a behavior that was previously reinforced no longer gets that result. The team stops reinforcing it, so the payoff is withheld. A 2023 review in the Journal of Applied Behavior Analysis by Fisher and colleagues puts it this way: when the link between a behavior and its reward is cut, the behavior drops "to low or zero levels."</p>
<p>A burst is what can happen on the way down. The same review: "Discontinuation of the contingency between a response and its reinforcer sometimes produces a temporary increase in the response before its rate decreases, a phenomenon called the extinction burst." Note the word "sometimes."</p>
<p>Think of a vending machine that stops giving snacks. Most people press the button harder a few times before they walk away. The pressing is the burst. The goal of an extinction procedure is to extinguish one behavior, never your child's ability to ask for things.</p></section>
<section id=examples><h2>Extinction burst examples at home</h2>
<style>@media (max-width:600px){.t-ex td:nth-child(1)::before{content:""}.t-ex td:nth-child(2)::before{content:"What used to happen"}.t-ex td:nth-child(3)::before{content:"The new plan"}.t-ex td:nth-child(4)::before{content:"What a burst looks like"}}</style><div class="table-wrap stack t-ex"><table>
<tr><th>Behavior</th><th>What used to happen</th><th>The new plan</th><th>What a burst looks like</th></tr>
<tr><td>Screaming at bedtime</td><td>Got 20 more minutes of play</td><td>Bedtime stays, a calm "one more song" request is taught</td><td>Louder, longer screaming for a few nights</td></tr>
<tr><td>Hitting when asked to clean up</td><td>Clean-up was dropped</td><td>Clean-up stays small, asking for help is taught</td><td>More hitting at first, then fewer episodes</td></tr>
<tr><td>Whining for the tablet</td><td>Tablet came back</td><td>A timer and a "my turn" card</td><td>Whining gets more intense before it fades</td></tr>
<tr><td>Tantrum at the store</td><td>A treat at checkout</td><td>Treat only for calm waiting, a picture schedule for the trip</td><td>One or two bigger tantrums at checkout</td></tr>
</table></div>
<p class=note>Illustrative examples, not case reports. In each one the burst is the same behavior, briefly stronger. That is the pattern to look for.</p></section>
<figure class=pb><img src="https://cdn.prod.website-files.com/65f21a701f9e963fc14601d3/6ad3cfbd1b19f286c87f2094_burst-b1-1400.webp" srcset="https://cdn.prod.website-files.com/65f21a701f9e963fc14601d3/6ad3cfc104f34bbe41011c94_burst-b1-700.webp 700w,https://cdn.prod.website-files.com/65f21a701f9e963fc14601d3/6ad3cfbd1b19f286c87f2094_burst-b1-1400.webp 1400w" sizes="(max-width:800px) 100vw,800px" alt="A young boy screams with his hands on his head" loading=lazy width=1400 height=700><figcaption>Stock photo. A burst is usually the old behavior turned up, not a brand-new one.</figcaption></figure>
<section id=often><h2>Does behavior always get worse before it gets better? How common extinction bursts in ABA therapy are</h2>
<p>No. This is the most repeated line online, and the research does not support it. Lerman and Iwata looked at 113 sets of published extinction data in 1995 and wrote that bursting "may not be as common as previously assumed (it occurred in 24% of the cases)." A 2024 review of 108 clinical records by Muething and colleagues found the same rate: "The prevalence of extinction bursts in our sample (24%) was consistent with that in prior literature."</p>
<div class=bars>
<div class=bar-label>Extinction used alone (1995 review)</div><div class=bar-track><div class=bar-fill style=width:36%>36%</div></div>
<div class=bar-label>All cases (1995 review, 113 data sets)</div><div class=bar-track><div class=bar-fill style=width:24%>24%</div></div>
<div class=bar-label>All cases (2024 review, 108 records)</div><div class=bar-track><div class=bar-fill style=width:24%>24%</div></div>
<div class=bar-label>Extinction plus another approach (1995 review)</div><div class=bar-track><div class=bar-fill style=width:12%>12%</div></div>
</div>
<p class=note>How often a burst was seen. Reviews of published and clinical treatment data, mostly serious problem behavior, not a survey of families at home.</p>
<p>The gap between 36% and 12% is the useful part. Bursts were much less common when extinction was paired with something else, like teaching a new way to ask. A 1999 study of 41 sets of data from people treated for self-injury found "extinction bursts or increases in aggression occurred in nearly one half of the cases," and again far fewer when extinction was part of a package.</p></section>
<section id=long><h2>How long does an extinction burst last?</h2>
<p>There is no fixed number of days. You will find "days to weeks" on many sites, and none of them trace it to a study. Some say it depends on the behavior's reinforcement history and on how well everyone can stay consistent. That is reasonable, but no study gives a number. The best data point is the 2024 record review, which found burst size "decreased across sessions" and told clinicians "to prepare for transient extinction bursts."</p>
<p>So the honest answer is: it should shrink from one session to the next. If it keeps growing, or a week of data shows no change, that is information for the behavior analyst, not a test of your patience. An old behavior can also pop back up later, after a holiday or a sick week. Behavior analysts call that spontaneous recovery. Mention it to the team so the plan can account for it.</p></section>
<figure class=ig><picture><source media="(max-width:640px)" srcset="https://cdn.prod.website-files.com/65f21a701f9e963fc14601d3/6ad49777df4526d440c12efd_ig-burst-check-m.png"><img src="https://cdn.prod.website-files.com/65f21a701f9e963fc14601d3/6ad497751bd0c4897c0a107d_ig-burst-check-d.png" alt="Burst or something else? Looks like a burst: the same behavior as before, started right after a planned change, the team is teaching a replacement skill, it eases across sessions. Talk to the BCBA this week: it grows session after session, nobody explained the plan, you have not seen the data. Call now: injury or a new dangerous behavior, signs of pain or illness, your child is afraid of sessions." loading=lazy></picture><figcaption>Achieving Stars Therapy graphic based on published extinction research and the BACB Ethics Code for Behavior Analysts.</figcaption></figure>
<section id=else><h2>Extinction burst or something else? Stress, distress and red flags</h2>
<p>A burst has a shape. It is the old problem behavior, stronger for a while, right after a planned change. Children with autism can show other challenging behaviors that look similar and need a different response:</p>
<ul>
<li><strong>A new dangerous behavior.</strong> Researchers in Greg Hanley's group wrote that extinction "can produce undesirable collateral effects" and can "induce other forms of dangerous problem behavior," such as aggression. That is not a burst to wait out.</li>
<li><strong>Pain or illness.</strong> The BACB Ethics Code (2.12) says behavior analysts ensure "medical needs are assessed and addressed if there is any reasonable likelihood that a referred behavior is influenced by medical or biological variables."</li>
<li><strong>Fear or distress about therapy.</strong> Crying at the door, hiding from the therapist, new sleep trouble. The code (2.11) makes BCBAs "responsible for obtaining assent from clients when applicable." Distress is data, and it belongs in the plan.</li>
<li><strong>Loss of skills.</strong> Talking less, giving up things your child could do. That is not what a burst looks like, and it needs a review.</li>
</ul>
<p>In short: a burst is about one behavior losing its payoff. If the change shows up across the whole day, raise it with the BCBA.</p></section>
<section id=good><h2>How a good team will implement extinction and manage extinction bursts</h2>
<p>It plans for them before they happen, and it tells you. A written extinction plan is part of the behavior change plan. The BACB code (2.16) requires behavior analysts to "describe in writing the objectives and procedures of the behavior-change intervention, any projected timelines, and the schedule of ongoing review" before starting.</p>
<ol class=steps>
<li><strong>Find the reason first.</strong> A functional behavior assessment, and sometimes a functional analysis, shows what the behavior gets your child.</li>
<li><strong>Teach a replacement at the same time.</strong> Functional communication training and other differential reinforcement give the child a better way to get the same thing. Positive reinforcement goes to the appropriate behavior. The 12% vs 36% gap above is why this matters.</li>
<li><strong>Make the new skill pay off well.</strong> Fisher and colleagues suggest a richer reward for the new skill may reduce bursts, while calling that idea "hypothetical and untested."</li>
<li><strong>Watch the data every session.</strong> Data collection by the registered behavior technician (RBT) shows quickly whether a burst is fading or starting to escalate. Code 2.18: "If data indicate that desired outcomes are not being realized, they actively assess the situation and take appropriate corrective action."</li>
<li><strong>Keep parents in the loop.</strong> Code 2.09 asks for the family's involvement "throughout the service relationship," including progress monitoring.</li>
</ol>
<p>Behavior analysts disagree on some of this. Hanley's group, after adding choices to reduce escalation, still wrote: "All successful, socially validated applications of skill-based treatment involved programmed extinction of problem behavior." Dr. Mary Barbera takes a firmer line on one form of it: "Using escape extinction is something some behavior analysts are still using, but regardless of profile, I do not recommend it and see many problems with this practice."</p></section>
<figure class=pb><img src="https://cdn.prod.website-files.com/65f21a701f9e963fc14601d3/6ad3cfc7c3b0fdada23e3fbb_burst-b2-1400.webp" srcset="https://cdn.prod.website-files.com/65f21a701f9e963fc14601d3/6ad3cfd15ea7d930ca0625e1_burst-b2-700.webp 700w,https://cdn.prod.website-files.com/65f21a701f9e963fc14601d3/6ad3cfc7c3b0fdada23e3fbb_burst-b2-1400.webp 1400w" sizes="(max-width:800px) 100vw,800px" alt="A mother and daughter play with wooden toys at a table" loading=lazy width=1400 height=700><figcaption>Stock photo. Teaching a new skill at the same time is what makes bursts less likely.</figcaption></figure>
<section id=ask><h2>Questions to ask your BCBA this week</h2>
<ol class=steps>
<li>Is extinction part of my child's ABA therapy plan? For which behavior?</li>
<li>What replacement skill are you teaching, and how is it rewarded?</li>
<li>Can I see the data from the last few sessions?</li>
<li>What would make you change the plan, and when is the next review?</li>
<li>Have we ruled out pain or a medical cause?</li>
<li>How are you checking that my child is willing to take part?</li>
</ol>
<p>A good clinician will be glad you asked. Each question maps to something the ethics code already says they owe you.</p></section>
<section id=stop><h2>When should you stop ABA or change providers?</h2>
<p>Consider a change of ABA therapy provider if there is no written plan, if you cannot see the data, if your concerns are brushed off, or if your child's distress is treated as something to push through. Those are not signs of a burst. They are signs of a poor fit.</p>
<p>Achieving Stars Therapy runs play-based ABA at home in <a href="https://www.achievingstarstherapy.com/location/states/aba-therapy-kansas">Kansas</a>, <a href="https://www.achievingstarstherapy.com/in-home-aba-therapy-new-hampshire">New Hampshire</a> and <a href="https://www.achievingstarstherapy.com/location/states/aba-therapy-colorado">Colorado</a> for children 18 months to 15 years. Every program is led by a BCBA and starts with a functional behavior assessment, so the plan targets the reason behind a behavior and teaches a safer one in its place. Its approach is "Connection over Control," and parents can see session notes, data and the treatment plan.</p></section>
<section id=faq><h2>Frequently Asked Questions</h2>
<details class=acc><summary>Is an extinction burst a sign that ABA is working?</summary><div><p>Not on its own. A burst only means the old reinforcement has stopped. Most cases in the published reviews had no burst at all, so a calm start is not a sign of failure either. Progress shows in the data over time.</p></div></details>
<details class=acc><summary>Can an extinction burst happen at home without ABA?</summary><div><p>Yes. Any time a behavior suddenly stops working, like a new bedtime rule, it can briefly get stronger. That is why a consistent plan between home and sessions matters.</p></div></details>
<details class=acc><summary>What is extinction-induced aggression?</summary><div><p>Aggression that appears when a behavior stops working. The 1999 study counted "increases in aggression" alongside bursts. It needs a plan change, not patience alone.</p></div></details>
<details class=acc><summary>Is extinction the same as ignoring my child?</summary><div><p>No. Extinction means the behavior stops getting its old result. For a behavior that gets attention, that can look like planned ignoring of that one behavior, while your child still gets attention for safer ways of asking.</p></div></details>
<details class=acc><summary>Should I stop ABA if behavior gets worse?</summary><div><p>Talk to the behavior analyst first and ask to see the data. Stop and call right away if there is injury, a new dangerous behavior, or your child is afraid of sessions.</p></div></details>
</section>
<section><h2>Sources</h2><ol class=src>
<li><a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC9868065/" rel="nofollow noopener" target=_blank>Fisher et al., Basic and applied research on extinction bursts, JABA</a></li>
<li><a href="https://doi.org/10.1901/jaba.1995.28-93" rel="nofollow noopener" target=_blank>Lerman and Iwata, 1995</a></li>
<li><a href="https://doi.org/10.1901/jaba.1999.32-1" rel="nofollow noopener" target=_blank>Lerman, Iwata and Wallace, 1999</a></li>
<li><a href="https://doi.org/10.1002/jaba.1054" rel="nofollow noopener" target=_blank>Muething et al., 2024</a></li>
<li><a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC8854458/" rel="nofollow noopener" target=_blank>Rajaraman, Hanley et al., 2022</a></li>
<li><a href="https://bacb.com/wp-content/ethics-code-for-behavior-analysts/" rel="nofollow noopener" target=_blank>BACB Ethics Code for Behavior Analysts</a></li>
<li><a href="https://marybarbera.com/pda-in-autism/" rel="nofollow noopener" target=_blank>Mary Barbera, PDA in autism</a></li>
</ol></section>
<p class=disclaimer>Sources read October 17, 2026. General information, not medical advice. If anyone is in danger, call 911. Experts quoted are not affiliated with Achieving Stars Therapy.</p>
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