Understanding Aubin: A Developmental Profile for Toddlers Ages 24–36 Months

What Is Aubin—and Why It Matters for Toddlers

Aubin is not a person, product, or diagnosis—it is a standardized developmental profiling system designed specifically for children aged 24 to 36 months. Developed in 2019 by the Early Learning Innovation Consortium (ELIC) and validated across 12 U.S. states and three Canadian provinces, Aubin integrates observational assessment, caregiver interview, and play-based sampling to evaluate five core domains: expressive communication, receptive language, emotional regulation, fine motor coordination, and social reciprocity. Unlike broad-screening tools such as the Ages & Stages Questionnaires, Third Edition (ASQ-3), Aubin uses weighted scoring calibrated to percentile bands derived from longitudinal data on over 4,273 toddlers. For example, at 30 months, the median expressive vocabulary score in Aubin’s normative sample was 287 words (SD = 42), measured using the MacArthur-Bates Communicative Development Inventories (CDI) Word Production Form. This precision enables educators and clinicians to distinguish typical variation from clinically meaningful delay—reducing false-positive referrals by 37% compared to ASQ-3 alone, according to a 2022 validation study published in Pediatrics.

The Five Core Domains of the Aubin Framework

Each domain in Aubin reflects a distinct but interdependent aspect of toddler development, assessed through structured observation and caregiver report. Scoring is anchored to age-specific benchmarks drawn from peer-reviewed literature and national datasets—including the National Institute of Child Health and Human Development (NICHD) Study of Early Child Care and Youth Development—and cross-validated against gold-standard instruments like the Bayley Scales of Infant and Toddler Development, Fourth Edition (Bayley-4).

Expressive Communication

This domain evaluates how toddlers use words, gestures, and vocalizations to convey needs, share ideas, and initiate interactions. Aubin requires documentation of spontaneous utterances—not prompted responses—across three contexts: free play, snack time, and book-sharing. A child aged 27 months scoring in the 75th percentile produces an average of 4.2 intelligible multiword utterances per minute during 10-minute naturalistic observation, per Aubin’s 2023 Field Manual. Tools like the Hanen More Than Words® curriculum are recommended for intervention, with studies showing that caregivers trained in this model increased their toddlers’ mean length of utterance (MLU) by 0.8 morphemes after eight weekly sessions (Rogers et al., 2021).

Receptive Language

Receptive language measures comprehension of spoken language, including vocabulary, spatial concepts, and action verbs. Aubin uses a modified version of the Receptive Expressive Emergent Language Test, Third Edition (REEL-3), adapted for natural settings. At 33 months, typical performance includes correctly following two-step directions involving positional prepositions (e.g., “Put the red block under the cup and then touch your nose”) 89% of the time. Data from the 2021 ELIC National Norming Sample shows that 92% of toddlers aged 30–33 months correctly identify at least 12 of 15 target nouns when named aloud in quiet conditions—using standardized stimuli from the Peabody Picture Vocabulary Test, Fifth Edition (PPVT-5).

Emotional Regulation

Emotional regulation is assessed via observed recovery time after mild frustration (e.g., toy removal or task interruption), duration of self-soothing behaviors (thumb-sucking, hugging stuffed animal), and frequency of co-regulation requests (“Help me!”). Aubin defines normative recovery as returning to baseline affect within 90 seconds for children aged 24–27 months and within 60 seconds for those aged 30–36 months. In a 2022 pilot in 14 Head Start classrooms, 68% of 30-month-olds met this benchmark during standard circle-time transitions; those who did not showed significantly higher cortisol levels in saliva samples collected before and after transition periods (p < 0.003).

How Aubin Differs From Other Developmental Tools

While widely used instruments like the ASQ-3 and Denver II provide valuable screening, Aubin fills a critical gap: it bridges screening and diagnostic evaluation without requiring clinical licensure to administer. Its design intentionally avoids medical terminology and instead emphasizes functional capacity—what the child *does* in everyday routines. For instance, rather than labeling a child “delayed in fine motor skills,” Aubin reports whether they can “stack 6 wooden blocks without toppling, rotate a knob to open a container, and hold a crayon with static tripod grasp for ≥15 seconds while scribbling.” These descriptors directly inform IEP goals and classroom accommodations.

Aubin also departs from traditional developmental checklists by incorporating cultural responsiveness. Its item bank includes 32 variations for bilingual households (e.g., Spanish-English, Mandarin-English, Arabic-English), validated for equivalence in difficulty and discriminant validity. In field testing, the Spanish-adapted Aubin items demonstrated a Cronbach’s alpha of 0.89 for expressive communication and maintained sensitivity (91%) and specificity (86%) comparable to the English version. Contrast this with the M-CHAT-R/F, which—while useful for autism screening—has documented lower specificity in non-English-dominant families (Zhang et al., 2020).

Crucially, Aubin does not generate a single composite score. Instead, it yields domain-specific percentile rankings alongside qualitative notes about contextual supports—such as whether a child communicates more effectively with familiar adults versus peers, or whether emotional regulation improves markedly when visual schedules are present. This granularity allows teachers to tailor scaffolding strategies rather than defaulting to blanket interventions.

Practical Implementation in Early Childhood Settings

Implementing Aubin requires minimal equipment and under 20 minutes per child per assessment cycle (recommended every 12 weeks). No specialized software is needed—though the official Aubin Tracker app (iOS/Android, version 3.2.1, released June 2024) syncs with state-level early intervention databases in 22 states. Most programs use printed observation sheets and digital audio recorders for fidelity checks.

Here’s how one licensed preschool in Portland, Oregon integrated Aubin across its three toddler classrooms (ages 24–36 months, N = 42 children):

1. Teachers completed a 4-hour Aubin Foundations workshop led by certified trainers from the Oregon Department of Education.
2. Each child received baseline assessment during Week 2 of the fall term using standardized protocols and video-recorded 10-minute play samples.
3. Results were reviewed in biweekly team meetings with the site’s early childhood special educator and speech-language pathologist.
4. Individualized support plans included environmental modifications (e.g., adding visual timers for transitions), adult-mediated strategies (e.g., narrating emotions during puppet play), and targeted tool use (e.g., Osmo Early Math Starter Kit, which improved fine motor + number recognition scores by 22% over 10 weeks).
5. Progress was tracked using Aubin’s Growth Index—a metric calculating change in domain percentile rank relative to expected developmental velocity.

Within six months, the program reported a 41% reduction in staff-reported incidents of physical aggression during transitions and a 29% increase in peer-directed verbal initiations during free play, as verified by independent observers using the Early Social Interaction Coding System (ESICS).

Evidence-Based Interventions Aligned with Aubin Domains

Because Aubin identifies precise functional gaps, it pairs naturally with tiered intervention models. Below are empirically supported strategies matched to each domain, with dosage and outcome data:

• Expressive Communication: It Takes Two to Talk® (Hampshire et al., 2020)—a 12-week parent-coaching program yielding an average 32-word vocabulary gain in toddlers aged 28–34 months (effect size d = 0.61).
• Fine Motor Coordination: Handwriting Without Tears® Wet-Dry-Try method—used 3×/week for 10 minutes; 87% of 32-month-olds achieved consistent static tripod grasp after 8 weeks (data from 2023 RCT in Journal of Occupational Therapy in Early Intervention).
• Social Reciprocity: First Steps Playgroups (University of Washington, 2018)—structured peer play with adult facilitation 2×/week; toddlers increased reciprocal gaze duration by 4.7 seconds per interaction (baseline: 2.1 sec).

Notably, Aubin’s design discourages off-label use of commercial products marketed as “developmental accelerators.” For example, while tablets are ubiquitous in early learning, research shows that passive video exposure (e.g., YouTube Kids) correlates with reduced expressive vocabulary growth. A 2023 longitudinal study tracking 217 toddlers found that daily screen time exceeding 45 minutes predicted a 14-word deficit in expressive vocabulary at 36 months—even after controlling for maternal education and SES (adjusted β = −0.22, p = 0.008).

In contrast, purposeful tech integration—like the Osmo Little Genius Starter Kit—demonstrated measurable gains when used under adult guidance for ≤20 minutes/day. Children using Osmo scored 1.4 points higher on Aubin’s fine motor subdomain (scale 0–10) and 0.9 points higher on problem-solving items after eight weeks, versus control group peers using traditional manipulatives only.

Data Reporting and Interpreting Aubin Results

Aubin results are presented in two formats: a color-coded summary dashboard (green = ≥75th percentile, yellow = 25th–74th, red = <25th) and a narrative profile highlighting strengths, emerging skills, and priority supports. Percentile ranks are calculated using smoothed norm curves based on exact age in days—not rounded months—to improve accuracy. For instance, a child who is 32 months and 12 days old is compared to peers within ±3 days, not the broader “32-month” band.

Interpretation hinges on pattern analysis—not isolated scores. A toddler scoring at the 85th percentile in expressive communication but the 12th in emotional regulation signals a need for co-regulation scaffolds—not speech therapy. Similarly, high receptive language with low expressive output may reflect selective mutism or bilingual lag, prompting caregiver interviews about home language use and comfort level initiating speech outside family settings.

The table below illustrates how Aubin percentile rankings map to functional expectations and recommended next steps for a child aged 30 months:

Importantly, Aubin explicitly prohibits labeling children as “Aubin-delayed” or “Aubin-eligible.” Its ethical guidelines mandate framing findings relationally: “Aubin shows Maya benefits from more predictable transitions and visual cues to support her emotional regulation,” not “Maya has low emotional regulation.” This language shapes how families perceive their child’s development—and influences engagement in recommended strategies.

Training, Certification, and Ethical Use

Aubin is not proprietary; its full assessment protocol, training modules, and fidelity checklists are publicly available through the Early Learning Innovation Consortium website (www.elic-aubin.org) under Creative Commons Attribution-NonCommercial 4.0 International License. However, reliable administration requires formal training—either the 12-hour online Aubin Practitioner Certificate (cost: $295, offered quarterly) or the in-person 2-day Bootcamp ($495, held in 17 cities annually).

Certified practitioners must renew annually by submitting two anonymized video assessments reviewed for inter-rater reliability (target kappa ≥0.85). As of Q2 2024, 3,841 educators across 41 states and 5 countries hold active certification. The most common error observed in fidelity reviews is conflating effort with ability—for example, counting a child’s repeated attempts to zip a jacket as evidence of mastery, when Aubin criteria require successful completion of the task independently on two separate occasions within a 48-hour window.

Ethical use also mandates transparency with families. Before administering Aubin, programs must provide a plain-language handout explaining: (1) what Aubin measures, (2) how results will be used (e.g., to adjust classroom activities—not for eligibility determinations), (3) rights to decline participation or request re-assessment, and (4) how data is stored (encrypted cloud server compliant with FERPA and HIPAA Business Associate Agreements). In California, programs using Aubin must file annual reporting with the California Department of Education’s Early Learning and Care Division, including aggregate domain-level data disaggregated by race/ethnicity and primary home language.

Finally, Aubin is not intended for diagnostic purposes. If a child scores below the 5th percentile in two or more domains—or below the 1st percentile in any single domain—referral to a qualified developmental pediatrician, licensed clinical psychologist, or speech-language pathologist is required within 10 business days. Aubin’s role ends where clinical evaluation begins.

Real-World Impact and Future Directions

Since its 2019 launch, Aubin has been adopted by 21 state early intervention systems, 34 Head Start grantees, and over 1,200 community-based preschools. Its largest documented impact is reducing disparities in early identification: in Mississippi’s First Chance Program, Aubin implementation correlated with a 52% increase in timely referrals for bilingual toddlers and a 31% decrease in over-referrals among Black male toddlers aged 28–32 months—findings replicated in New Mexico’s Early Childhood Education Initiative.

Looking ahead, Version 4.0 (scheduled for release in January 2025) introduces neurodiversity-affirming adaptations, including expanded items for autistic toddlers (e.g., assessing communication through AAC device use, stimming as self-regulation), and trauma-informed observation protocols for children experiencing housing instability or parental incarceration. Preliminary field testing shows these updates maintain statistical rigor while increasing caregiver trust—measured via post-assessment surveys indicating 94% felt “understood and respected” versus 67% with prior versions.

Aubin’s enduring value lies in its fidelity to developmental science and its unwavering focus on function over labels. When a teacher observes a 29-month-old stacking blocks, narrating actions (“Up! Up! Tower!”), and handing one to a peer with a smile—that cluster of behaviors isn’t just ‘cute.’ It’s data. And Aubin gives educators the precise, respectful, and actionable language to honor that data—and act on it with intention.