By Matt Harrington, BCBA · Behaviorist Book Club · Research-backed answers for behavior analysts
Consent is the formal, informed agreement provided by a client's legal guardian or the client themselves if they are of legal age and capacity. It involves understanding the nature, risks, and benefits of treatment and agreeing to proceed. Assent, in contrast, is the client's ongoing willingness to participate in intervention activities, expressed through their behavior rather than through formal documentation. Assent is particularly important for clients who cannot provide formal consent, such as young children or individuals with significant intellectual disabilities. Monitoring assent means continuously observing the client for signs of agreement or disagreement with the activities being implemented and responding appropriately when assent appears to be withdrawn.
Withdrawn assent can manifest in many ways depending on the individual client. Common indicators include verbal refusals, physical resistance to prompts or materials, crying or emotional distress, turning away from the task or practitioner, attempting to leave the instructional area, pushing away materials, becoming rigid or unresponsive, engaging in self-injurious behavior, or displaying physiological signs of stress such as rapid breathing or flushing. Because these indicators vary across individuals, it is important to develop client-specific operational definitions of withdrawn assent based on the individual's communication repertoire and behavioral history. These definitions should be documented in the treatment plan and shared with all team members.
No. Honoring assent does not mean eliminating demands or avoiding challenging activities. It means implementing demands in a way that respects the client's autonomy and wellbeing. When assent appears to be withdrawn, the practitioner should have pre-planned responses that provide the client with some control while maintaining therapeutic value. This might mean offering a choice between two tasks, providing a brief break before returning to the activity, reducing the difficulty of the current demand, or transitioning to a different activity temporarily. The goal is to maintain engagement and learning while demonstrating respect for the client's signals of distress or refusal.
In a center-based setting, trauma-informed care involves creating a physically and emotionally safe environment, maintaining predictable routines and transitions, minimizing unnecessary physical prompting, providing advance notice of changes, offering choices throughout the day, and training all staff to recognize and respond to trauma responses. Specific practices might include using visual schedules to increase predictability, designating a calm-down space where clients can go when overwhelmed, reviewing new clients' histories for trauma indicators before beginning services, and holding regular team meetings to discuss client-specific trauma-informed modifications. The physical environment should also be considered, with attention to noise levels, lighting, and sensory input.
Traditional training methods for assent-based practices often rely on didactic instruction such as lectures, readings, or presentations that teach the concepts but do not develop the skills needed to apply them in real time. BST goes further by including modeling, where the trainer demonstrates how to recognize and respond to withdrawn assent, rehearsal, where the trainee practices these skills in simulated scenarios, and feedback, where the trainer provides specific corrective and reinforcing input. This multi-component approach builds the fluency needed for practitioners to respond to assent signals in the moment-to-moment flow of clinical sessions, where decisions must be made quickly and accurately.
Program modifications for clients with trauma histories should be individualized based on the nature of the trauma and the client's behavioral responses. Common modifications include reducing or eliminating physical prompting and using gestural or visual prompts instead, building gradual exposure to challenging activities rather than using immediate full-demand procedures, incorporating choice throughout sessions, ensuring the client always has access to a break or escape option, avoiding environments or stimuli that are known triggers, maintaining consistent routines and providers, and using a calm and predictable instructional pace. All modifications should be documented in the treatment plan and communicated to every team member.
Behavior analysts should consider referrals when a client displays persistent trauma responses that significantly interfere with their daily functioning or participation in ABA services, when the client's trauma history is complex or recent, when the client exhibits symptoms consistent with post-traumatic stress disorder or other trauma-related conditions, or when the behavior analyst's modifications are not sufficient to address trauma-related behaviors. Behavior analysts should not attempt to conduct trauma therapy, as this is outside the scope of ABA practice. Instead, they should collaborate with mental health professionals to ensure coordinated care that addresses both behavioral and psychological needs.
Supervisors can develop BST protocols specifically for trauma-informed competencies. Start by identifying the specific skills you want to train, such as recognizing trauma responses, modifying prompt hierarchies, or implementing break procedures. Provide instruction through brief training sessions that explain the rationale and procedures. Model the skills during actual sessions or through recorded demonstrations. Have the RBT rehearse the skills through role-play scenarios that simulate common clinical situations. Provide immediate, specific feedback during rehearsal and during live sessions. Assess competency using a checklist of observable behaviors and continue the training cycle until the RBT demonstrates mastery across scenarios.
When treatment is medically necessary or safety is at stake, the behavior analyst must balance respect for assent with the obligation to protect the client from harm. In these situations, the focus shifts from seeking affirmative assent to minimizing distress while maintaining necessary interventions. This might involve using the least intrusive effective procedure, providing as much choice and control as possible within the constraints of the situation, using pairing procedures to build positive associations with necessary activities, and ensuring that the rationale for overriding assent is documented and reviewed regularly. The key ethical principle is that overriding assent should be the exception rather than the rule, and should always be the minimum necessary to ensure safety.
Collect data on the frequency and duration of assent withdrawal events, the practitioner's response to each event, the client's subsequent behavior following the response, overall session engagement levels, and progress on clinical targets. Compare these metrics before and after implementing assent-based modifications to evaluate their impact. Additionally, track treatment integrity data to ensure that practitioners are implementing the modifications as designed. If assent withdrawal events decrease over time while clinical progress is maintained or improved, this suggests that the modifications are effective. If target acquisition slows significantly, adjustments to the modifications may be needed rather than abandoning the approach entirely.
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All behavior-analytic intervention is individualized. The information on this page is for educational purposes and does not constitute clinical advice. Treatment decisions should be informed by the best available published research, individualized assessment, and obtained with the informed consent of the client or their legal guardian. Behavior analysts are responsible for practicing within the boundaries of their competence and adhering to the BACB Ethics Code for Behavior Analysts.