By Matt Harrington, BCBA · Behaviorist Book Club · April 2026 · 12 min read

Applications of Assent for the Practicing Clinician: Respecting Client Autonomy in Pediatric ABA

Overview & Clinical Significance

Assent, the affirmative agreement to participate in treatment or specific therapeutic activities, has become one of the most important and actively discussed concepts in contemporary behavior analysis. For clinicians working in pediatric settings, where clients often cannot provide legal consent, the concept of assent represents a critical mechanism for honoring client autonomy and ensuring that therapeutic interactions are experienced as respectful and collaborative rather than coercive.

The clinical significance of assent extends far beyond compliance with ethical standards. When practitioners incorporate assent into their clinical practice, they fundamentally change the therapeutic dynamic. Rather than imposing interventions on passive recipients, clinicians engage in a collaborative process where the client's communication, whether verbal, gestural, or behavioral, is interpreted as meaningful input that influences the course of treatment. This shift has profound implications for therapeutic outcomes, client dignity, and the long-term perception of ABA as a field that respects the individuals it serves.

Assent withdrawal, the process by which a client communicates that they no longer wish to participate in a therapeutic activity, is particularly important and clinically nuanced. Recognizing and responding to assent withdrawal requires clinicians to develop sophisticated observational skills and to make real-time clinical judgments about the meaning of client behavior. A child who turns away, cries, physically resists, or becomes unresponsive during a session may be communicating withdrawal of assent. The practitioner's response to these communications sends a powerful message about whether the client's autonomy is valued and respected.

The growing attention to assent in behavior analysis reflects broader changes in how the field conceptualizes the therapeutic relationship. Historically, ABA practice sometimes emphasized therapist control and client compliance as prerequisites for effective intervention. The assent-based paradigm challenges this framework by positioning the client as an active participant whose preferences, comfort, and communication shape the therapeutic process. This paradigm shift has been influenced by the neurodiversity movement, autistic self-advocates, and practitioners who have witnessed the harmful effects of therapy that prioritizes compliance over consent.

For clinicians, developing competency in assent-based practice is not optional. It represents a fundamental clinical skill that affects treatment outcomes, ethical compliance, and the therapeutic relationship. Clients who feel respected and empowered in therapy are more likely to engage actively, generalize skills, and maintain positive associations with learning environments.

Background & Context

The concept of assent in healthcare has roots in medical ethics and pediatric medicine, where the challenge of obtaining meaningful agreement from minor patients has been addressed through frameworks that supplement parental consent with child assent. In behavior analysis, the concept has gained prominence more recently as the field has grappled with criticisms about the coercive nature of some ABA practices and has sought to develop more client-centered approaches.

The distinction between consent and assent is foundational to this discussion. Consent is a legal concept that requires the capacity to understand the nature and consequences of a decision. In pediatric settings, consent is provided by parents or legal guardians. Assent, by contrast, is a developmentally appropriate process through which the child indicates willingness to participate, even though they may not fully understand all aspects of the treatment. Assent recognizes that children have preferences, comfort levels, and agency that deserve respect regardless of their legal capacity to consent.

The ethics literature in behavior analysis has increasingly addressed assent as a component of ethical practice. The concept aligns with the field's emphasis on social validity, which requires that treatment goals, procedures, and outcomes are acceptable to clients and stakeholders. When clients actively resist or withdraw from therapeutic activities, this resistance constitutes social validity data indicating that the procedures may not be acceptable to the client, regardless of their effectiveness in changing behavior.

The autistic self-advocacy community has played a significant role in bringing assent to the forefront of ABA discourse. Many autistic adults who received ABA as children have shared experiences of therapy that felt coercive, distressing, or dismissive of their autonomy. These accounts have prompted the field to examine how traditional ABA practices, including the use of physical prompting, repeated trial presentations despite client distress, and compliance-based programming, may sometimes violate clients' assent. This examination has led to meaningful changes in how many practitioners approach therapy.

Current research supports the application of assent-based approaches in pediatric therapy. Studies have demonstrated that providing choices, respecting withdrawal signals, and incorporating client preferences into treatment sessions can maintain or improve treatment outcomes while reducing problem behavior and increasing client engagement. These findings challenge the assumption that assent-based practice necessarily compromises treatment effectiveness and suggest that respecting client autonomy may actually enhance therapeutic outcomes.

The practical application of assent requires clinicians to develop specific competencies including the ability to identify individualized assent and withdrawal signals, establish and follow assent protocols, communicate effectively with families about assent-based practice, and make real-time clinical decisions about when to modify or discontinue activities based on client communication.

Clinical Implications

Implementing assent-based practice requires substantial changes to how clinicians plan, deliver, and evaluate therapeutic sessions. These changes affect every level of clinical practice, from treatment planning to moment-to-moment decision-making during sessions.

The first clinical implication involves the identification of individualized assent and withdrawal signals. Every client communicates differently, and clinicians must learn to recognize each client's unique way of expressing willingness and unwillingness to participate. For some clients, assent may be expressed through verbal agreement, approach behavior, smiling, or active engagement with materials. For others, assent may be communicated through more subtle behaviors such as body orientation, eye contact, or relaxed posture. Similarly, withdrawal signals vary widely and may include turning away, pushing materials away, crying, physical aggression, self-injurious behavior, going limp, or simply disengaging from the activity.

Developing individualized assent protocols is a critical clinical task. These protocols should specify the behaviors that indicate assent for each client, the behaviors that indicate withdrawal, the procedure to follow when withdrawal is observed, and the conditions for re-presenting the activity. These protocols should be developed collaboratively with families and updated as the client's communication repertoire develops. The protocols should be written clearly enough that all team members, including RBTs, can implement them consistently.

The clinical implications of assent withdrawal are particularly complex. When a client withdraws assent, the clinician faces a decision: honor the withdrawal by discontinuing the activity, or continue despite the withdrawal signals. Assent-based practice generally requires honoring the withdrawal, but this creates clinical tensions. If a client withdraws assent from a medically necessary skill target (such as tolerating dental exams), the clinician must balance respect for autonomy with the client's health and safety needs. Similarly, if a client withdraws assent from activities that are reinforcing in the long term but mildly aversive in the short term (such as academic tasks), the clinician must distinguish between genuine distress and escape-maintained behavior.

These clinical tensions do not have simple answers, and resolving them requires thoughtful analysis of each situation. However, the default position in assent-based practice should be to honor withdrawal unless there is a compelling, documented reason to do otherwise. When withdrawal is overridden, the rationale should be clearly documented, the family should be informed, and the treatment plan should be modified to reduce the aversiveness of the procedure.

Assent-based practice also has implications for how clinicians use prompting hierarchies. Physical prompting, in particular, requires careful consideration through an assent lens. Hand-over-hand assistance that proceeds despite visible client distress may represent a violation of assent. Clinicians should consider whether less intrusive prompting strategies could achieve the same outcomes and should be attentive to client responses during any physical prompting procedure.

Finally, assent-based practice changes how treatment progress is evaluated. In addition to traditional measures of skill acquisition and behavior reduction, clinicians should track measures of client engagement, emotional state during sessions, and the frequency of assent withdrawal. Consistently high rates of withdrawal may indicate that the treatment approach needs modification, even if skill acquisition data shows progress.

Ethical Considerations

The ethical foundations of assent-based practice are deeply embedded in the Ethics Code for Behavior Analysts (2022). Multiple codes support the prioritization of client autonomy and the respectful treatment of individuals receiving ABA services.

Code 2.01 (Providing Effective Treatment) might initially seem to conflict with assent-based practice, as some practitioners argue that honoring assent withdrawal could reduce treatment time and slow progress. However, a broader interpretation of effective treatment recognizes that interventions must not only produce behavior change but also maintain the therapeutic relationship, support client dignity, and avoid causing harm. Treatment that produces skill gains while simultaneously causing distress or eroding trust may not be truly effective when evaluated against these broader criteria.

Code 1.07 (Cultural Responsiveness and Diversity) has important implications for assent-based practice. Concepts of child autonomy, parental authority, and therapeutic participation vary across cultural contexts. Some families may view assent-based approaches as permissive or as undermining parental decision-making. Clinicians must navigate these cultural dynamics with sensitivity, explaining the rationale for assent-based practice while respecting family values and cultural perspectives. The goal is to find an approach to assent that honors both the client's autonomy and the family's cultural context.

Code 2.14 (Selecting, Designing, and Implementing Behavior-Change Interventions) requires that behavior analysts consider the least restrictive procedures. Assent-based practice extends this principle by positioning the client's ongoing agreement as a criterion for intervention selection. When multiple evidence-based approaches are available, the approach that the client is most willing to engage with represents the least restrictive option, all else being equal.

Code 2.15 (Minimizing Risk of Behavior-Change Interventions) is directly relevant to assent. Overriding a client's withdrawal signals carries risks including emotional harm, erosion of trust, increased challenging behavior, and negative associations with therapy. These risks must be weighed against the potential benefits of continuing the intervention. Assent-based frameworks provide a structured approach to this risk-benefit analysis.

Code 3.12 (Advocating for Appropriate Services) supports the practitioner's role in advocating for service delivery models that incorporate assent. When organizational expectations or funding structures create pressure to maintain high levels of direct service regardless of client assent, practitioners have an ethical obligation to advocate for changes that allow for assent-based practice.

The ethical considerations also extend to communication with families. Informed consent discussions should include explicit information about how assent will be addressed during treatment. Families should understand what assent looks like for their child, how withdrawal will be handled, and how assent-based practice supports their child's long-term well-being. This transparency builds trust and creates a shared understanding between families and clinicians about the treatment approach.

Assessment & Decision-Making

Developing and implementing an effective assent framework requires systematic assessment at multiple levels: assessing the client's communication repertoire, identifying individualized assent and withdrawal signals, establishing decision-making protocols for complex situations, and monitoring the effectiveness of assent-based practices over time.

The initial assessment should focus on understanding how the client communicates comfort and discomfort. This assessment draws on multiple sources: direct observation of the client across settings and activities, interviews with caregivers about how the child typically expresses preferences and distress, review of existing communication assessments and behavior data, and trial-based observation of responses to preferred and non-preferred activities. The goal is to develop a comprehensive inventory of the client's assent and withdrawal behaviors, recognizing that these may vary across contexts and communication partners.

Once the client's communication patterns are understood, the clinician should develop a formal assent protocol. This protocol should be written in clear, operational terms that any team member can follow. It should specify the antecedent conditions that should precede each therapeutic activity (such as presenting a choice or providing a preparatory cue), the specific behaviors that indicate assent, the specific behaviors that indicate withdrawal, the exact procedure to follow when withdrawal is observed (such as pausing the activity, offering a break, providing choices, or transitioning to a preferred activity), and the conditions and timeline for re-presenting the activity.

Decision-making becomes more complex when assent withdrawal conflicts with other clinical or safety considerations. A structured decision-making framework can help clinicians navigate these situations. First, determine whether the activity is medically necessary or safety-critical. If so, document the necessity and develop a plan to minimize distress while completing the activity, while simultaneously programming for desensitization. Second, if the activity is not safety-critical, honor the withdrawal and analyze the function of the withdrawal behavior. Is the client communicating genuine distress, or has escape from the activity been reinforced? Third, regardless of the analysis, treat the withdrawal as meaningful communication and modify the treatment approach to reduce aversiveness, increase motivation, or address skill deficits that make the activity unnecessarily difficult.

Ongoing data collection should include measures of assent withdrawal frequency, duration of engagement before withdrawal, client emotional state during sessions, and the relationship between assent measures and traditional outcome measures. These data should be reviewed regularly during supervision and treatment planning meetings to evaluate whether the assent protocol is functioning effectively and whether modifications are needed.

Family involvement in the assessment and decision-making process is essential. Caregivers often have the most nuanced understanding of their child's communication and can provide invaluable input on assent signals that may not be apparent in clinical settings. Regular communication with families about how assent is being addressed during sessions builds trust and ensures that the clinical approach aligns with family values and priorities.

What This Means for Your Practice

Integrating assent into your clinical practice is both a practical and philosophical commitment. It requires developing new skills, revising existing protocols, and fundamentally shifting how you think about the therapeutic relationship.

Start by auditing your current practices. Observe your sessions and those of your supervisees with an assent lens. How are clients communicating during sessions? Are there moments when clients are showing signs of distress or withdrawal that are being overlooked? Are prompting procedures being implemented in ways that override client communication? This honest assessment provides a baseline for improvement.

Develop individualized assent protocols for each client on your caseload. Collaborate with families and team members to identify each client's unique assent and withdrawal signals. Write these protocols in clear, operational language and train all team members to follow them consistently. Review and update protocols regularly as clients develop new communication skills.

Build assent-related competencies in your supervisees and team members. Many RBTs and newer BCBAs may not have received training in assent-based practice during their education. Provide training that includes both the conceptual framework for assent and practical skills for implementing it during sessions. Use role-play, video modeling, and in-vivo feedback to develop these skills.

Communicate proactively with families about your approach to assent. Many families will appreciate learning that their child's preferences and comfort are prioritized during therapy. Some families may have concerns about whether assent-based practice will compromise treatment effectiveness. Address these concerns with empathy and evidence, explaining how assent-based approaches can maintain or enhance outcomes while supporting their child's dignity and autonomy.