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

Analyzing Assent and Taking Data: A Framework for Respecting Client Autonomy in ABA

Overview & Clinical Significance

Assent has emerged as one of the most important ethical and clinical concepts in contemporary behavior analysis. While informed consent has long been a cornerstone of ethical practice, assent addresses the ongoing, moment-to-moment agreement of the individual receiving services to participate in those services. For many clients served by behavior analysts, particularly children and individuals with intellectual disabilities who may not have the legal capacity to provide informed consent, assent represents the primary mechanism through which their autonomy and preferences are respected during treatment.

The clinical significance of assent-based practice cannot be overstated. When practitioners attend to assent, they are fundamentally orienting their practice around the client's experience rather than simply the client's behavior change data. This orientation has profound implications for treatment acceptability, therapeutic relationship quality, and long-term outcomes. Clients whose assent is respected and who have genuine opportunities to decline participation tend to show greater treatment engagement, faster skill acquisition in voluntary contexts, and fewer treatment-evoked challenging behaviors.

This training provides a comprehensive five-part framework for understanding, measuring, and integrating assent into clinical practice. It addresses the conceptual distinction between assent and informed consent, the identification and measurement of vocal and verbal behaviors that indicate assent or assent withdrawal, the design of concurrent chains arrangements for client choice, and the application of degrees of freedom to assess client choice in treatment plans. Each of these components is essential for moving assent from an abstract ethical principle to a measurable, operationalizable component of clinical practice.

The importance of this topic is amplified by growing recognition within the field that historically, behavior analysis has not always adequately prioritized client autonomy. The development of interventions that produce behavior change without attending to the client's willingness to participate raises serious ethical concerns. A treatment that is effective by behavioral metrics but is experienced as coercive or distressing by the client represents a failure of ethical practice regardless of the data. Assent-based practice addresses this concern directly by building client choice and voice into the structure of treatment itself.

For practitioners, developing competency in assent assessment and measurement represents a significant expansion of their clinical skill set. It requires the ability to identify subtle behavioral indicators of willingness and reluctance, to design treatment environments that honor client preferences, and to make real-time clinical decisions based on ongoing assent data. These skills make practitioners more responsive, more ethical, and ultimately more effective.

Background & Context

The concept of assent in behavior analysis has its roots in broader bioethical principles that have evolved over decades. In medical ethics, the distinction between informed consent and assent was developed primarily in the context of pediatric research and treatment, recognizing that children who cannot legally consent can still express meaningful preferences about their participation. Behavior analysis has adopted and adapted these concepts to address the unique circumstances of its client populations.

Informed consent is a legal and ethical process through which a competent individual or their legal guardian receives information about a proposed treatment, understands the risks and benefits, and voluntarily agrees to proceed. It is typically a formal process that occurs at specific decision points such as the initiation of services, changes to treatment plans, or the introduction of new interventions. Assent, by contrast, is the ongoing behavioral expression of willingness to participate. It is not a one-time event but a continuous process that must be monitored throughout every treatment interaction.

The behavioral indicators of assent and assent withdrawal vary across individuals and must be operationally defined for each client. For some clients, assent may be indicated by verbal agreement, approach behavior, task engagement, and positive affect. Assent withdrawal may be indicated by verbal refusal, moving away from the treatment area, crying, aggression, or other behaviors that communicate reluctance or distress. For non-vocal clients, the identification of assent and withdrawal indicators requires careful observation and collaboration with caregivers who know the individual well.

Concurrent chains arrangements represent a methodological approach to providing genuine choice within treatment. In a concurrent chains arrangement, the client is presented with two or more options and allowed to choose between them. This might involve choosing between two different activities, between participating in a treatment session and engaging in an alternative activity, or between different ways of completing a task. The arrangement allows the practitioner to observe the client's preferences through their choices while ensuring that the client has a genuine alternative to participation.

The concept of degrees of freedom provides a framework for evaluating how much genuine choice exists within a treatment plan. A treatment plan with high degrees of freedom offers the client multiple decision points throughout their day, including choices about what to work on, when to take breaks, how to complete tasks, and when to end activities. A treatment plan with low degrees of freedom is highly structured with few opportunities for client input. Evaluating degrees of freedom helps practitioners identify where additional choice can be embedded without compromising treatment objectives.

This framework builds on the field's growing commitment to client-centered, dignity-respecting practice. It represents a shift from a model in which the behavior analyst designs treatment and the client complies, to a model in which the client is an active participant whose preferences and autonomy are treated as essential variables in treatment design and implementation.

Clinical Implications

Integrating assent into clinical practice has far-reaching implications for how treatment is designed, implemented, and evaluated. The most fundamental implication is that assent data become a treatment variable as important as behavior change data. A treatment that produces rapid skill acquisition but requires coercion or overriding the client's expressed reluctance is not a successful treatment, and assent data provide the means to identify and address this problem.

Measurement of assent requires the same rigor applied to any other behavioral target. Practitioners must operationally define assent and assent withdrawal indicators for each client, train data collectors to record these indicators reliably, and develop data display systems that allow for ongoing monitoring. This means adding assent-related data columns to session data sheets, graphing assent data alongside skill acquisition and behavior reduction data, and using assent trends to inform clinical decisions.

When assent withdrawal is observed, the clinical response should be immediate and systematic. The practitioner or technician should pause the current demand, provide the client with an opportunity to communicate their needs or preferences, offer alternatives when possible, and document the withdrawal and the response. Continued implementation of demands in the face of clear assent withdrawal is ethically problematic and may constitute a violation of the client's rights.

Concurrent chains arrangements have specific implications for session structure. Rather than presenting a single sequence of activities that the client is expected to complete, sessions can be structured to include choice points at regular intervals. For example, a session might begin with a choice between two target activities, include scheduled break opportunities, and end with a preferred activity selected by the client. The key is that the choices must be genuine. If selecting the alternative to treatment always results in the practitioner redirecting the client back to treatment, the arrangement is not a true concurrent chain but rather an illusion of choice.

The degrees of freedom analysis has implications for treatment plan design and review. During treatment plan development, practitioners should explicitly evaluate the number and quality of choice opportunities embedded in the plan. During treatment plan review, assent data should be examined alongside outcome data to determine whether the plan adequately balances therapeutic goals with client autonomy. If assent data show persistent withdrawal during specific activities or with specific demands, this information should drive treatment modifications.

For technician training, assent-based practice requires explicit instruction in recognizing assent indicators, responding to assent withdrawal, implementing concurrent chains arrangements, and recording assent data. Many technicians have been trained in compliance-based models that prioritize following through with demands regardless of the client's apparent willingness. Transitioning to an assent-based model requires unlearning some of these practices and developing new skills for reading and responding to client communication.

The implications for caregiver collaboration are equally significant. Caregivers are often the best source of information about their child's assent and withdrawal indicators, and they need to understand and support assent-based practices at home. This may require psychoeducation about why honoring assent withdrawal is not the same as giving in to challenging behavior and how providing genuine choices actually increases cooperation and skill development over time.

Ethical Considerations

Assent is deeply embedded in the ethical framework of behavior-analytic practice, and the BACB Ethics Code for Behavior Analysts (2022) addresses it from multiple angles. The core principles of the Code, particularly those related to respecting client autonomy, dignity, and rights, provide the ethical foundation for assent-based practice.

Code 2.11 (Obtaining Informed Consent) establishes the requirement for obtaining consent from clients or their legal representatives before initiating services. However, consent alone is insufficient when the client cannot independently provide it. For clients who lack the cognitive or communicative capacity for formal informed consent, assent represents the primary mechanism through which their voices are heard in the treatment process. The ethical obligation extends beyond obtaining a signature on a consent form to ensuring ongoing, active client agreement with the treatment they receive.

Code 2.01 (Providing Effective Treatment) must be interpreted in the context of assent. Treatment that is effective by behavioral metrics but is experienced as aversive or coercive by the client raises questions about whether it truly serves the client's interest. Effective treatment should produce meaningful improvement in the client's quality of life, and quality of life includes the experience of autonomy and self-determination. Assent-based practice ensures that effectiveness is measured not only by what the data show but also by how the client experiences the treatment process.

Code 2.14 (Selecting, Designing, and Implementing Behavior-Change Interventions) requires the use of least restrictive effective alternatives. Assent-based practice operationalizes this requirement by establishing client willingness as a prerequisite for proceeding with treatment activities. When a client withdraws assent, the ethical response is to seek less restrictive alternatives rather than to override the client's expressed preference.

Code 2.15 (Interrupting or Discontinuing Services) is relevant when persistent assent withdrawal may indicate that the treatment approach is not appropriate for the client. If a client consistently withdraws assent from specific interventions despite modifications, the ethical response may be to discontinue that approach and explore alternatives rather than to continue overriding the client's apparent wishes.

Code 3.01 (Responsibility to Clients) establishes the overarching obligation to act in the client's best interest. There is an inherent tension in assent-based practice between respecting client autonomy and ensuring that clients receive the treatment they need. A client who withdraws assent from a medically necessary intervention, for example, presents a genuine ethical dilemma. The resolution lies not in simply overriding assent but in careful analysis of whether the intervention can be modified to obtain assent, whether alternative approaches exist, and whether the benefits of proceeding without assent clearly outweigh the costs to the client's autonomy and trust.

Code 4.07 (Incorporating and Addressing Diversity) is relevant because assent indicators are influenced by cultural and individual factors. What constitutes a clear expression of assent or withdrawal varies across individuals and cultural contexts, and practitioners must be sensitive to these differences. A one-size-fits-all approach to assent assessment risks misinterpreting culturally influenced behaviors.

The ethical imperative is clear: behavior analysts must develop the skills to identify, measure, and respond to assent as a fundamental component of ethical practice. This is not optional or aspirational. It is a core professional responsibility.

Assessment & Decision-Making

Developing a robust assent assessment system requires several components that work together to provide ongoing, actionable information about the client's willingness to participate in treatment.

The first step is individualized operational definitions of assent and assent withdrawal indicators. These definitions should be developed collaboratively with the client (when possible), caregivers, and the treatment team. For each client, identify the specific behaviors that indicate willingness to participate (approach behavior, task engagement, positive affect, verbal agreement, reaching for materials) and the specific behaviors that indicate reluctance or withdrawal (moving away, covering ears or eyes, saying no, crying, pushing materials away, aggression). These indicators must be specific enough to be reliably measured and should be validated against the client's known communication patterns.

The second step is designing a data collection system for assent. This might involve interval recording of assent indicators throughout sessions, event recording of assent withdrawal instances, or latency measures of how quickly the client re-engages after being offered choices. The data system should be practical enough for technicians to use during sessions without significantly disrupting the flow of treatment. Many practitioners find that adding a simple assent column to existing session data sheets is the most sustainable approach.

Concurrent chains arrangements require careful design to be both valid and practical. The choice options must be genuinely distinct, the client must understand what each option entails, and the consequences of each choice must be consistently delivered. For example, if a client is offered the choice between a structured teaching activity and a play-based activity, both options should be available and the client should not be redirected back to the structured activity if they choose play. The practitioner should record the client's choices over time to identify preference patterns and use these patterns to inform treatment planning.

Degrees of freedom analysis involves reviewing each component of a treatment plan and identifying where client choice is and is not available. Create a matrix listing all treatment activities, transitions, and daily routines, and for each one, note whether the client has choices about what, when, where, how, or with whom the activity occurs. Calculate the ratio of choice opportunities to total activity components. If this ratio is low, identify specific points where additional choice can be embedded without compromising treatment objectives.

Decision-making about assent should follow a clear protocol. When assent withdrawal is observed, the immediate response should be to pause, acknowledge the client's communication, and offer an alternative. If withdrawal is frequent during a specific activity, the treatment team should analyze whether the activity can be modified, whether the demands can be reduced, whether additional reinforcement is needed, or whether the activity should be replaced with a different approach to the same treatment goal. Persistent assent withdrawal should trigger a formal treatment plan review.

Data-based decision rules for assent should be established in the treatment plan. For example, if assent withdrawal occurs during more than a specified percentage of sessions over a defined period, the team will convene to modify the approach. These decision rules ensure that assent data drive clinical action rather than simply being collected and filed.

What This Means for Your Practice

Integrating assent into your practice requires both a philosophical shift and practical skill development. The philosophical shift involves genuinely accepting that your clients have the right to participate in decisions about their treatment, even when they cannot provide formal informed consent. This means viewing assent withdrawal not as noncompliance to be managed but as communication to be respected.

Begin by operationally defining assent and assent withdrawal indicators for each client on your caseload. Collaborate with caregivers and technicians to identify the behaviors that reliably indicate willingness and reluctance. Add these definitions to your treatment plans and train your team to recognize and record them.

Design at least one concurrent chains arrangement for each client that provides a genuine choice between treatment participation and an alternative activity. Monitor the client's choices over time and use this information to evaluate treatment acceptability. If a client consistently chooses the alternative over treatment, this is valuable data about the client's experience of treatment, not a problem to be solved through increased reinforcement for compliance.

Conduct a degrees of freedom analysis on each treatment plan on your caseload. Identify where additional choice opportunities can be embedded and make concrete changes. Even small additions of choice, such as allowing the client to choose the order of activities or select materials, can meaningfully increase the client's sense of autonomy.

Finally, establish data-based decision rules for assent that are documented in the treatment plan and understood by the entire team. These rules ensure that assent data are not just collected but actually used to drive clinical decisions that respect the client's voice and improve their experience of treatment.