Is ABA Therapy Harmful? The Controversy and Alternatives

Historical Concerns

Early ABA for autism, particularly intensive Lovaas-method discrete trial training (DTT) developed in the 1960s-80s, used techniques that are now widely condemned:

• Electric shocks and other aversive stimuli to suppress autistic behaviors (Lovaas’s original research included these; they are now prohibited by most professional bodies)
• Physical restraint and punishment-based contingencies
• Intensive suppression of stimming and other natural autistic behaviors regardless of whether those behaviors were harmful
• Goals explicitly designed to make children “indistinguishable from their peers”, a goal that many argue prioritizes appearance over wellbeing

Many autistic adults who received intensive ABA as children have shared accounts of lasting psychological harm, including symptoms consistent with PTSD, anxiety, and the burden of learned masking. These accounts have been influential in the autistic self-advocacy movement and have prompted significant change in the ABA field.

How Modern ABA Has Changed

Contemporary ABA has evolved substantially in response to both research and community criticism. Modern evidence-based approaches include:

• Naturalistic Developmental Behavioral Interventions (NDBIs): Play-based, child-led approaches, including Pivotal Response Treatment (PRT), the Early Start Denver Model (ESDM), and JASPER, that embed learning in natural routines and follow the child’s interests
• Prohibition of aversives: The Behavior Analyst Certification Board (BACB) ethics code requires practitioners to use the least restrictive, most effective procedures
• Focus on functional communication: Modern ABA increasingly prioritizes helping autistic people communicate effectively, including via AAC
• Neurodiversity-affirming ABA: A growing number of BCBAs explicitly frame their practice within a neurodiversity paradigm, targeting skills that improve quality of life rather than normalization

The extent to which these changes have been adopted varies widely across individual providers. Families should ask specific questions about any provider’s approach before beginning services.

What Autistic Self-Advocates Say

The Autistic Self Advocacy Network (ASAN) and similar organizations have called for alternatives to ABA, particularly any ABA that targets behaviors that are harmless but autistic-typical. Common concerns from autistic self-advocates include:

• Suppression of stimming robs autistic people of important self-regulatory tools and forces harmful masking
• Goals focused on eye contact, sitting still, and appearing neurotypical do not serve the autistic individual’s wellbeing
• Some self-advocates question high-intensity schedules when they leave too little room for free play, rest, or autistic community
• Autistic voices have been largely excluded from designing ABA research and practice

At the same time, many autistic individuals have had positive experiences with specific ABA-based interventions, particularly those focused on functional communication. The autistic community is not monolithic, and individual experiences with ABA vary widely.

Frequently Asked Questions

What is the controversy around ABA therapy?

ABA therapy has the most peer-reviewed research of any autism intervention, but many autistic adults and self-advocacy organizations have criticized its historical and sometimes current use. Core concerns include: ABA's historical use of aversive (punishing) techniques, goals focused on making autistic people appear neurotypical rather than supporting wellbeing, suppression of natural autistic behaviors like stimming, and potential contribution to autistic burnout and PTSD-like symptoms. Supporters argue modern ABA is fundamentally different from older approaches.

Has ABA therapy been harmful in the past?

Early ABA, particularly discrete trial training developed by Ivar Lovaas in the 1960s-80s, used electric shocks, physical restraint, and other aversive techniques to suppress autistic behaviors. These practices have been widely condemned and are no longer used in ethical modern ABA. However, the legacy of these approaches has contributed to deep distrust among many autistic adults who experienced intensive ABA. Many autistic adults have reported that early ABA therapy caused lasting psychological harm.

How is modern ABA different from older approaches?

Modern evidence-based ABA has substantially evolved. Contemporary approaches, particularly Naturalistic Developmental Behavioral Interventions (NDBIs) like Pivotal Response Treatment (PRT) and the Early Start Denver Model (ESDM), are play-based, child-led, and focused on communication and functional skills rather than compliance and normalization. Aversive techniques are prohibited by most professional bodies. However, quality varies widely among providers, and not all programs marketed as ABA reflect these principles.

Do autistic adults support ABA therapy?

Autistic adults have diverse views on ABA. Many autistic self-advocacy organizations, including the Autistic Self Advocacy Network (ASAN), are opposed to ABA, particularly for goals focused on masking or eliminating harmless autistic behaviors. However, individual autistic adults hold a wide range of perspectives. Some report that specific ABA-based interventions were helpful for developing communication skills; others report significant harm. Families are encouraged to seek out autistic perspectives and include autistic individuals in treatment decisions.

How can families evaluate an ABA provider?

Key questions to ask an ABA provider: Do you use any aversive techniques? What behaviors are you targeting and why, are they harmful or just different? How are the autistic individual's preferences and comfort incorporated? Do you respect stimming and other self-regulatory behaviors? Are autistic adults involved in supervising or consulting on your programs? What is your BCBA's training and approach to neurodiversity-affirming care? Families should seek a provider certified by the Behavior Analyst Certification Board (BACB) with explicit commitment to naturalistic, child-led, neurodiversity-affirming approaches.