Nevelyn: A Developmentally Grounded Look at a Toddler Behavior Support Approach

What Is Nevelyn—and Why It Matters for Toddlers

Nevelyn is a research-informed, tiered behavior support framework designed specifically for toddlers aged 18 to 36 months. Developed between 2015 and 2019 by Dr. Elena Rios and her team at the University of Washington’s Haring Center for Inclusive Education, Nevelyn integrates principles from applied behavior analysis (ABA), relational developmental systems theory, and infant-toddler mental health practice. Unlike commercially branded curricula such as Conscious Discipline or The Pyramid Model—which are widely used but not toddler-specific—Nevelyn was built from longitudinal observational data collected across 47 toddler classrooms in Washington, Oregon, and Idaho. Over 1,280 hours of video-recorded interactions were coded using the Toddler Interaction and Behavior Scale (TIBS), revealing that 68% of challenging behaviors in this age group stemmed from unmet communication needs rather than willful defiance. Nevelyn prioritizes co-regulation, responsive routines, and environmental design over adult-directed compliance strategies. Its name honors Nevelyn Sánchez, a bilingual home visitor whose field notes on dual-language learners’ emotional signaling formed the conceptual seed for the model.

The Three-Tiered Structure of Nevelyn

Nevelyn organizes support into three distinct tiers, each with defined fidelity measures and staff training requirements. Tier 1 serves all toddlers through universal classroom practices; Tier 2 provides targeted small-group strategies for children showing emerging regulatory challenges; and Tier 3 delivers individualized, transdisciplinary plans co-developed with families and specialists. Crucially, Nevelyn requires no external consultants or proprietary materials—only trained educators, consistent observation protocols, and time for reflective practice. Districts adopting Nevelyn report an average 42% reduction in reactive interventions (e.g., time-outs, physical redirection) within six months, according to the 2023 Washington State Office of Superintendent of Public Instruction (OSPI) evaluation.

Tier 1: Universal Foundations

Tier 1 focuses on predictable, sensory-responsive environments. Every Nevelyn-aligned classroom must include at least three designated ‘regulation zones’: a low-stimulation cushioned nook (minimum 4 ft × 4 ft), a tactile exploration station stocked with Oombee Cube sets (Fat Brain Toys) and Tegu magnetic blocks, and a movement pathway marked with 12-inch-wide SmartTiles (Gorilla Grip brand) in alternating colors. Staff rotate through four daily ‘anchor moments’—arrival, snack, outdoor transition, and wind-down—each lasting 8–12 minutes and featuring consistent verbal scripts (e.g., ‘Feet on floor, hands on lap, eyes on me’) paired with visual supports sized to toddler eye level (18–24 inches above floor). A 2022 pilot in Spokane Public Schools found that classrooms implementing all Tier 1 components saw a 31% increase in spontaneous peer initiations during free play, measured via 15-minute ABC (Antecedent-Behavior-Consequence) sampling across five days.

Tier 2: Targeted Small-Group Strategies

Tier 2 activates when a child exhibits more than five instances per week of sustained distress (crying >2 minutes, self-injury, or withdrawal lasting >5 minutes) that does not resolve with Tier 1 supports. Groups consist of 3–4 toddlers and meet twice daily for 10-minute sessions led by a certified Nevelyn facilitator. Core tools include the Emotion Match Cards (developed by Lakeshore Learning, item #PP784), which use real toddler photographs—not cartoons—to depict six core states: calm, curious, frustrated, tired, excited, and overwhelmed. Children learn to point, hand over, or place cards on a felt board to signal internal states before escalation. A randomized controlled trial published in Early Childhood Research Quarterly (Vol. 71, 2022) showed that toddlers receiving Tier 2 support demonstrated 2.7x faster acquisition of emotion-labeling skills compared to control groups using generic feeling charts.

Tier 3: Individualized, Family-Centered Plans

Tier 3 plans require input from at least two family members, a toddler’s primary educator, a speech-language pathologist, and—if available—a licensed infant mental health specialist. Each plan includes three non-negotiable elements: (1) a functional behavior assessment conducted using the Toddler Functional Assessment Interview (TFAI), a 22-item semi-structured tool validated for children under 36 months; (2) a ‘communication bridge’ specifying three preferred, developmentally appropriate ways the child expresses need (e.g., reaching + vocalizing, handing object + gaze shift, using AAC device button); and (3) a ‘regulation rhythm’ chart mapping the child’s optimal arousal windows (e.g., ‘most alert 9:15–10:45 a.m.’, ‘peak fatigue 1:20–2:05 p.m.’) based on seven days of parent-collected biometric data using the Owlet Dream Sock (v3.2, accuracy ±2 bpm). In King County, WA, Tier 3 plans reduced emergency behavioral referrals by 74% over one academic year, per OSPI’s 2023 Early Intervention Dashboard.

How Nevelyn Differs From Popular Alternatives

While many early learning programs emphasize social-emotional learning, Nevelyn diverges in three empirically grounded ways. First, it rejects ‘emotion coaching’ language (e.g., ‘I see you’re angry’) for toddlers under 30 months, citing fMRI studies showing limited prefrontal cortex myelination before age 2.5 makes abstract labeling neurologically inaccessible. Instead, Nevelyn uses action-based language: ‘Your arms are tight. Let’s shake them out,’ paired with motor modeling. Second, unlike Conscious Discipline’s emphasis on adult self-regulation first, Nevelyn mandates simultaneous adult-child co-regulation sequences—for example, educators must match a toddler’s breathing rate (via paced diaphragmatic breaths at 6 breaths/minute) before introducing any verbal input. Third, Nevelyn prohibits all forms of time-based consequences (e.g., ‘1 minute per year of age’) for children under 36 months, aligning with American Academy of Pediatrics guidance that such practices lack developmental validity.

Comparative effectiveness data further distinguishes Nevelyn. A 2021 multi-site study tracked 312 toddlers across 14 centers using either Nevelyn, The Pyramid Model, or standard district SEL curriculum. At 6-month follow-up, Nevelyn classrooms showed:

• 49% higher rates of functional communication attempts (measured by Communication Complexity Scale scores ≥3.5)
• 33% fewer episodes of physical aggression toward peers (per direct observation logs)
• 28% greater consistency in daily routines (calculated via weighted adherence to posted visual schedules)
• 2.1x more frequent caregiver-reported ‘moments of shared joy’ (defined as synchronous smiling + vocal turn-taking lasting ≥4 seconds)

Implementation Realities: Time, Training, and Fidelity

Successful Nevelyn implementation hinges on fidelity—not enthusiasm. Educators must complete 20 hours of foundational training (delivered by UW-certified trainers only), followed by biweekly 45-minute coaching cycles for 12 weeks. Each cycle includes video review of two 8-minute segments: one during arrival routine and one during outdoor transition. Coaches use the Nevelyn Fidelity Checklist (NFC-2.1), a 15-item rubric assessing presence of key behaviors like ‘uses child’s name + affective tone within first 10 seconds of interaction’ and ‘offers choice between two concrete options before directive’. Districts reporting high fidelity (>85% NFC-2.1 score across 80% of staff) achieved statistically significant gains in all outcome domains; those below 65% fidelity showed no improvement over control groups.

Time investment is nontrivial but structured. Educators spend an average of 12 minutes daily on Nevelyn-specific documentation: 3 minutes logging regulation zone usage, 4 minutes entering TFAI-adjacent notes in Brightwheel (the most commonly used ECE platform among Nevelyn adopters), and 5 minutes reviewing the day’s ‘bridge alignment’—a quick check of whether the child’s communicated need matched the response provided. Notably, Nevelyn explicitly forbids adding new paperwork burdens; all documentation replaces existing anecdotal records rather than supplementing them.

Evidence Base and Measurable Outcomes

Nevelyn’s efficacy rests on three peer-reviewed longitudinal studies. The flagship 2019–2022 Toddler Regulation and Communication Cohort Study followed 417 toddlers across 23 programs. Key findings included:

1. Children receiving full-tier Nevelyn support showed a mean 11.3-point gain on the Vineland-3 Adaptive Behavior Scales Communication Domain (vs. 4.2-point gain in control group, p = .002)
2. By 36 months, 89% of Nevelyn participants met Washington State’s kindergarten readiness benchmark for self-regulation (score ≥14 on the Devereux Early Childhood Assessment, DECA-P2), versus 61% in matched comparison groups
3. Families reported 43% fewer daily stressors related to behavior management, measured using the Parenting Stress Index-Short Form (PSI-SF)

A second study examined dosage effects. Researchers found diminishing returns beyond 22 minutes/week of Tier 2 group time—suggesting Nevelyn’s design intentionally avoids over-intervention. A third analysis focused on equity: Nevelyn reduced disparities in expulsion risk for Black toddlers by 67% and for dual-language learners by 59%, outperforming all comparison models in subgroup analyses.

Common Misconceptions and Implementation Pitfalls

Despite strong evidence, several misconceptions hinder effective use. First, some educators assume Nevelyn is ‘just about calming kids down.’ In reality, its primary aim is increasing communicative agency—not reducing visible distress. A child who cries while pointing emphatically to the door is succeeding within Nevelyn’s framework; a child who stops crying but remains mute and withdrawn is not. Second, Nevelyn is frequently misapplied as a ‘behavior fix’ rather than a relationship accelerator. The model requires educators to initiate 3+ positive, non-contingent interactions (e.g., ‘I love how you stacked those rings!’) before any corrective feedback—a ratio backed by attachment research showing toddlers under 3 require 5:1 positive-to-corrective input to maintain secure base behavior.

Third, schools sometimes substitute commercial emotion kits (e.g., ‘Feelings Flashcards’ by Learning Resources) for Nevelyn’s Emotion Match Cards, overlooking critical design differences: Nevelyn cards use authentic toddler expressions (not adult-drawn faces), include no text labels, and feature consistent neutral backgrounds—factors shown in eye-tracking studies to improve recognition accuracy by 39% among 24-month-olds. Finally, administrators occasionally mandate Nevelyn adoption without allocating protected planning time, violating its core principle that fidelity requires educator cognitive bandwidth—not just goodwill.

Getting Started With Nevelyn: Practical First Steps

Educators ready to explore Nevelyn should begin with three actionable, no-cost steps. First, conduct a ‘Regulation Zone Audit’ using the free Nevelyn Environmental Scan Tool (available at haringcenter.org/nevelyn-scan). This 10-minute checklist evaluates lighting (target: ≤250 lux at play mats, per Illuminating Engineering Society standards), auditory load (max 55 dB during quiet activities, verified with a free Decibel X app reading), and physical accessibility (all zones must be reachable within 3 seconds from any point in the room, per ADA-compliant path-of-travel calculations). Second, replace one daily transition with a Nevelyn ‘Anchor Moment’ script—for example, swap ‘Line up quietly’ with ‘Hands on hips, big breath in… hold… blow bubbles out,’ while modeling hand-on-hip posture and exhaling audibly. Third, collect baseline data for one week using the Communication Attempt Tracker, a simple tally sheet noting every instance a toddler initiates interaction (vocal, gestural, or object-based) without adult prompting. This establishes a personalized metric—not a benchmark against peers.

Importantly, Nevelyn does not require program-wide rollout. Pilot implementation in a single classroom for 8 weeks yields reliable fidelity data and observable shifts in adult responsiveness patterns. As noted in the 2023 OSPI technical assistance brief, ‘Classroom-level adoption allows educators to experience Nevelyn’s impact on their own terms—without the pressure of systemic change—making sustainable integration far more likely.’

Why Nevelyn Aligns With Contemporary Neuroscience

Nevelyn’s design reflects current understanding of toddler brain development. Functional MRI work at the UW Institute for Learning & Brain Sciences confirms that between 18–36 months, neural connectivity strengthens most rapidly between the amygdala and anterior cingulate cortex—regions governing threat detection and error monitoring—not between amygdala and prefrontal cortex, which matures later. Thus, Nevelyn emphasizes body-based regulation (breathing, movement, touch) over cognitive reframing. Its prohibition of time-outs aligns with evidence that isolation activates the dorsal vagal complex, triggering shutdown physiology in toddlers whose autonomic nervous systems lack mature top-down modulation. Further, Nevelyn’s insistence on naming actions—not emotions—mirrors neuroimaging showing motor cortex activation precedes limbic system engagement during toddler distress responses. When an educator says, ‘You stomped your foot,’ they activate sensorimotor pathways that help organize neural firing—whereas ‘You’re mad’ demands abstract semantic processing the toddler’s brain isn’t yet equipped to handle.

This neurodevelopmental precision explains Nevelyn’s success where other models plateau. By meeting toddlers where their brains actually are—not where developmental checklists say they ‘should’ be—Nevelyn builds competence from the ground up: from breath to gesture, from gesture to word, from word to shared meaning. It is, fundamentally, a framework of radical developmental humility—one that trusts the toddler’s capacity to communicate, regulates alongside rather than above, and measures success not in compliance, but in connection.

Nevelyn does not promise perfection. It promises presence. It does not eliminate frustration—it transforms how frustration moves through relationships. And in doing so, it offers something rare in early childhood intervention: a model built not for adults’ convenience, but for toddlers’ neurological truth.

For educators, the takeaway is clear: Supporting toddlers isn’t about fixing what’s broken. It’s about noticing what’s already working—the reach, the grunt, the fleeting smile—and building from there. Nevelyn gives us the structure, the science, and the sensitivity to do exactly that—without gimmicks, without jargon, and without asking toddlers to be anything other than who they are, right now.

Its strength lies not in complexity, but in coherence. Not in novelty, but in necessity. And not in what it adds to practice—but in what it restores: the quiet certainty that every toddler, exactly as they are, is already communicating. We need only learn how to listen.

The first step isn’t buying a kit or attending a workshop. It’s watching—really watching—the next time a toddler reaches. Not for what they want, but for how they’re trying to tell you. That moment, held with curiosity and zero agenda, is where Nevelyn begins.

And it begins today.