These answers draw in part from “Special Paper: Pediatrics and Development” by Shouberte Abreu, QBA, LBA, IBA, ITDS, CEO (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 →The VB-MAPP is primarily a verbal behavior curriculum organized around Skinner's analysis of verbal operants, and it covers communication development in depth. But ABA programs for 2- to 5-year-olds typically address much more than communication: play, social-emotional skills, adaptive behavior, and motor development all need to be contextualized developmentally for appropriate goal selection. Cognitive development — symbolic thinking, early executive function, representational play — is particularly important for understanding whether a child is ready for certain kinds of learning tasks and why some teaching approaches work better than others at different developmental levels. Developmental milestones across all five domains provide the full map that communication-focused tools alone cannot.
Begin with the child's current behavioral profile from your assessment tools and identify the domains where the child's skills are most discrepant from typical development. Those are the domains where developmental contextualization is most important: understanding the typical sequence tells you what precursor skills may need to be in place before advancing, and what the next developmentally proximal target should be. For a child with significant social-emotional delays relative to cognitive level, the social-emotional developmental sequence — from parallel play through cooperative play, from co-regulation through self-regulation — provides the framework for goal sequencing. For a child with communication as the primary target, the typical language development sequence informs goal selection and helps identify whether the child's current trajectory is consistent with typical development or diverging from it.
Recognize the referral threshold. BCBAs should have sufficient developmental knowledge to identify when a child's motor development is significantly delayed relative to their age peers and to understand how motor prerequisites might be affecting learning in other domains. When motor development is significantly delayed or atypical — for example, if a 4-year-old has not achieved developmental milestones for gross motor skills that typically appear by age 2 to 3 — a referral for OT or PT evaluation is warranted. BCBAs do not need to conduct motor assessments or design motor treatment programs; they need to recognize when motor development is a variable affecting the ABA program and coordinate with the appropriate specialist.
Executive function — including inhibitory control, working memory, and cognitive flexibility — develops rapidly between ages 2 and 5 and directly affects how children respond to teaching procedures. A 2-year-old with very limited inhibitory control will struggle with discrete trial formats that require sustained attending and response inhibition; naturalistic teaching embedded in preferred activities may be more effective because it works with the child's current executive function capacity rather than against it. As executive function develops through ages 3 to 5, children become increasingly able to participate in more structured learning contexts. BCBAs who understand this developmental trajectory make better instructional design decisions and are less likely to attribute response limitations to behavioral factors when the underlying issue is developmental readiness.
Frame developmental milestones as a map of next steps, not a measure of deficits. 'Here is where Jaylen is currently in his social play development — he is showing a lot of exploratory play with objects, which is exactly the foundation we build on. The next step in the typical sequence is functional play, where children use objects in their conventional way. That is what these goals are designed to develop.' This framing situates the current level as a foundation rather than a failure, and it gives caregivers a clear picture of why the current goals were selected and where they lead. Avoid comparing the child to neurotypical age peers in ways that emphasize the gap; instead, compare the child to their own previous skills to highlight progress.
Social-emotional development in ages 2 to 5 encompasses co-regulation (the child's capacity to manage emotions with caregiver support), emerging self-regulation, theory of mind development, and the shift from parallel to associative to cooperative play. Each of these has direct implications for ABA target selection. Programs that target cooperative play skills before a child has developed the social-emotional prerequisites for associative play will struggle because the prerequisite repertoire is not in place. Programs that require independent emotional regulation from children who are still in the co-regulation stage will produce challenging behavior when the regulatory demand exceeds the child's current capacity. Mapping social-emotional goals onto the developmental sequence prevents these mismatches.
The strongest evidence comes from the Naturalistic Developmental Behavioral Interventions literature. ESDM (Early Start Denver Model), JASPER (Joint Attention, Symbolic Play, Engagement, and Regulation), and PRT (Pivotal Response Treatment) all integrate developmental frameworks into behavioral intervention design, and their outcomes research shows strong results for language, social communication, and adaptive behavior. Comparative studies have found that developmental-behavioral integration produces better generalization and naturalistic use of skills compared to highly structured, discrete-trial-only approaches — an outcome that makes sense given that developmental frameworks are specifically designed to describe how skills emerge and generalize in natural developmental contexts.
Uneven developmental profiles are the norm rather than the exception in children with autism and related diagnoses. BCBAs should sequence goals within each domain according to that domain's developmental sequence, rather than assuming that advancement in one domain predicts readiness in another. A child with advanced language relative to their age can still be in an early stage of play development; targets in play should follow the play developmental sequence regardless of language level. Where domains intersect — for example, language skills needed for sociodramatic play — the intersection should be planned explicitly, identifying what prerequisite skills from each domain need to be in place before the integrative target is introduced.
Focus on one domain at a time and anchor developmental information directly to the coaching targets. If you are coaching a caregiver on following the child's lead during play, explain it in terms of the child's current play development stage — one concrete, clear description of where the child is and what the next step looks like. Avoid presenting the full developmental taxonomy; instead, give the caregiver the developmental context that makes this specific coaching target meaningful. A simple handout with three to four sentences about typical play development for a child at their child's level is more useful than a comprehensive developmental overview.
In an interdisciplinary early intervention team, the BCBA brings expertise in learning principles, behavioral assessment, and systematic skill-building. Developmental knowledge does not replace any of that — it enhances the BCBA's ability to contribute meaningfully to team discussions about goal priorities and intervention sequence. A BCBA who understands developmental milestones can have substantive conversations with SLPs about communication targets, with OTs about the play and motor prerequisites for ABA goals, and with developmental pediatricians about the child's overall developmental trajectory. This positions the BCBA as a collaborative team member rather than a behavioral specialist operating in parallel, which produces better-coordinated programs and better outcomes for the child and family.
The ABA Clubhouse has 60+ on-demand CEUs including ethics, supervision, and clinical topics like this one. Plus a new live CEU every Wednesday.
Ready to go deeper? This course covers this topic with structured learning objectives and CEU credit.
Special Paper: Pediatrics and Development — Shouberte Abreu · 1 BACB Supervision CEUs · $20
Take This Course →We extended these answers with research from our library — dig into the peer-reviewed studies behind the topic, in plain-English summaries written for BCBAs.
280 research articles with practitioner takeaways
279 research articles with practitioner takeaways
256 research articles with practitioner takeaways
1 BACB Supervision CEUs · $20 · BehaviorLive
Research-backed educational guide with practice recommendations
Side-by-side comparison with clinical decision framework
You earn CEUs from a dozen different places. Upload any certificate — from here, your employer, conferences, wherever — and always know exactly where you stand. Learning, Ethics, Supervision, all handled.
No credit card required. Cancel anytime.
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.