These answers draw in part from “Day 2: Ethical Considerations in Teaching Verbal Behavior” by Judah Axe (BehaviorLive), and extend it with peer-reviewed research from our library of 27,900+ ABA research articles. Clinical framing, BACB ethics code references, and cross-links below are synthesized by Behaviorist Book Club.
View the original presentation →An educational tact is a verbal response produced under structured conditions where a therapist presents a discriminative stimulus (such as holding up an object or picture and asking "what is this?") and provides a consequence for a correct response. A natural tact is a spontaneous verbal response evoked by a nonverbal stimulus in the learner's natural environment without explicit prompting. For example, a child who sees a fire truck drive by and says "fire truck!" without being asked is producing a natural tact. The distinction matters because educational tacts demonstrate that the learner has the response in their repertoire, while natural tacts demonstrate that the learner uses that response functionally in daily life. Many learners acquire educational tacts readily but do not spontaneously tact without specific programming to promote generalization.
Code 2.14 of the BACB Ethics Code reflects the understanding that behavior change is only meaningful if it persists in the client's natural environment after intervention supports are removed or reduced. An intervention that produces behavior change only under controlled clinical conditions has limited practical value to the client. For verbal behavior specifically, teaching a child to label objects only when a therapist holds them up does not meaningfully improve their communication in daily life. The ethical standard exists because clients and families invest significant time, money, and emotional energy in ABA services, and they deserve outcomes that make a genuine difference in the learner's real-world functioning.
Before 2000, the dominant approach was highly structured discrete trial training that focused on building rote verbal responses in controlled settings. Therapists presented stimuli, prompted responses, and delivered consequences in rapid succession. While effective at establishing initial repertoires, this approach often produced verbal behavior that was prompt-dependent and did not generalize. The shift toward naturalistic approaches emphasizes embedding teaching within ongoing activities, using naturally occurring motivating operations and reinforcers, varying stimuli and settings, and measuring outcomes in terms of spontaneous functional communication rather than just accuracy under structured conditions. Contemporary best practice typically involves a blend of structured and naturalistic teaching, with explicit programming for generalization.
Measuring spontaneous tacting requires observation during unstructured activities where no explicit discriminative stimuli for tacting are provided by the therapist. You can conduct brief naturalistic probes by placing novel or interesting items in the environment and observing whether the learner spontaneously comments on them. Record the frequency of unprompted tacts during free play, transitions, outdoor activities, and other natural contexts. Compare these data to the learner's performance during structured tact probes to identify the generalization gap. Caregiver report can supplement direct observation, as parents observe their child in contexts the clinician does not. Some practitioners use momentary time sampling during naturalistic activities to estimate the rate of spontaneous verbal behavior.
Structured teaching is entirely appropriate and often necessary for establishing initial verbal repertoires, particularly for learners who are early in their verbal behavior development. The ethical concern is not with using structured teaching but with failing to program for generalization to natural contexts. Best practice involves using structured formats to establish initial responding, then systematically fading the structured supports while introducing naturalistic teaching opportunities. This might include gradually moving teaching from the table to natural environments, fading explicit discriminative stimuli, varying stimuli across exemplars, and shifting from contrived to natural reinforcement. The goal is to use structure as a scaffold that is systematically removed, not as a permanent feature of instruction.
The mand is generally easier to teach in naturalistic conditions because the motivating operation (the learner wants something) and the reinforcer (receiving what was requested) are naturally aligned. When a child is thirsty and says "water," the teaching condition and the natural condition are essentially identical. Tacting is more challenging because the natural reinforcer for tacting (generalized social reinforcement like attention, acknowledgment, or conversation) is more variable and diffuse than the specific reinforcement that maintains mands. This means that behavior analysts must be more deliberate about programming naturalistic tacting, including ensuring that the social environment consistently reinforces spontaneous commenting and that sufficient motivating operations for tacting exist in the learner's environment.
Caregivers are essential partners in developing naturalistic verbal behavior because they interact with the learner across far more contexts and hours than any therapist. When caregivers are trained to recognize and respond to spontaneous tacts, mands, and other verbal behavior with natural social reinforcement, they create thousands of learning opportunities throughout the day. Caregiver training should include how to pause and wait for spontaneous communication rather than always prompting, how to respond enthusiastically to spontaneous verbal behavior, how to create environmental arrangements that occasion communication, and how to expand on the learner's verbal behavior to model more complex language. Without caregiver involvement, even the best clinical programming is unlikely to produce robust naturalistic verbal behavior.
The decision to shift toward more naturalistic teaching should be guided by data. Key indicators include the learner demonstrating consistent accuracy under structured conditions (suggesting the response is in their repertoire), the learner beginning to show some spontaneous verbal behavior outside of structured teaching, and evidence that the learner can attend to naturally occurring stimuli rather than only therapist-presented materials. The shift should be gradual rather than abrupt, with structured and naturalistic teaching running concurrently during the transition. Monitor both structured accuracy and naturalistic frequency during this transition to ensure that the repertoire is transferring rather than deteriorating.
Using approaches that are clearly outdated and producing inferior outcomes could be considered inconsistent with several ethical standards. Code 2.01 (Providing Effective Treatment) requires behavior analysts to provide services in the best interest of the client, and Code 2.13 (Selecting, Designing, and Implementing Assessments) expects the use of current best practices. If a behavior analyst continues to use exclusively structured approaches for verbal behavior when evidence supports the addition of naturalistic methods, and if the learner is not achieving meaningful communication outcomes, the behavior analyst has an ethical obligation to update their practice. Continuing with an ineffective approach simply because it is familiar or easier to implement does not meet the standard of client-centered care.
Goals should specify not only the target verbal operant and the accuracy criterion but also the conditions under which the behavior should occur. Rather than writing "the learner will correctly tact 50 items with 90 percent accuracy across three consecutive sessions," consider adding naturalistic criteria such as "the learner will spontaneously tact at least five items per 15-minute observation during unstructured activities without therapist prompting." Goals can also specify generalization requirements, such as demonstrating the skill across multiple settings, with multiple people, or with novel stimuli. Including both structured mastery criteria and naturalistic performance criteria ensures that the treatment team is working toward genuinely functional communication, not just structured responding.
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Day 2: Ethical Considerations in Teaching Verbal Behavior — Judah Axe · 1 BACB Ethics CEUs · $20
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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.