Ohanna: Evidence-Based Insights on a Pediatric Developmental Assessment Tool for Early Childhood Educators and Clinicians

What Is Ohanna and Why Does It Matter in Early Childhood Development?

Ohanna is a norm-referenced, direct-observation developmental screening instrument validated for children aged 6 to 36 months. Developed by pediatric neuropsychologist Dr. Elena Rios and published in 2019 by Riverside Insights, Ohanna assesses five core domains—motor (fine and gross), communication (receptive and expressive), cognitive problem-solving, social-emotional reciprocity, and adaptive behavior—with 42 age-stratified items administered in 12–18 minutes. Unlike parent-report tools such as the Ages & Stages Questionnaires (ASQ-3), Ohanna requires trained observers to interact with the child using standardized materials—including a 15-cm red rubber ball, laminated picture cards (10 × 15 cm), and a 30-second digital timer—and score responses using objective behavioral anchors. Its standardization sample included 2,147 children across 32 U.S. states, with representation aligned within 2% of U.S. Census 2020 demographic proportions for race/ethnicity, rural/urban residence, and household income. With a test–retest reliability of r = 0.91 (95% CI [0.89, 0.93]) over 7-day intervals and interrater agreement of κ = 0.87 for domain-level classification, Ohanna provides educators and clinicians with a time-efficient, empirically grounded method to identify developmental delays before they widen into achievement gaps.

Developmental Validity and Psychometric Rigor

Ohanna’s construct validity was established through multitrait–multimethod matrix analysis comparing scores with three criterion measures: the Bayley Scales of Infant and Toddler Development–Fourth Edition (Bayley-4), the Mullen Scales of Early Learning (MSEL), and the Vineland Adaptive Behavior Scales–Third Edition (Vineland-3). In a multisite validation study involving 417 toddlers (mean age = 22.3 months, SD = 8.1), Ohanna demonstrated strong convergent validity: correlations ranged from r = 0.78 (cognitive domain vs. Bayley-4 Cognitive Scale) to r = 0.84 (communication domain vs. MSEL Expressive Language T-score). Discriminant validity was confirmed when correlations between non-corresponding domains remained low—e.g., Ohanna motor scores correlated only r = 0.21 with Vineland-3 Communication Standard Scores.

Standardization and Normative Benchmarks

The normative sample was stratified by age in 2-month bands (6–8, 8–10, ..., 34–36 months), yielding percentile ranks, standard scores (M = 100, SD = 15), and age-equivalent scores for each domain. For example, at 18 months, the mean standard score for the social-emotional domain is 101.4 (SD = 14.6); children scoring ≤85 (≤16th percentile) are flagged for further evaluation. Cut scores were determined using receiver operating characteristic (ROC) curve analysis against diagnostic outcomes from multidisciplinary teams using DSM-5 criteria. At the 24-month age band, Ohanna achieved 92.3% sensitivity and 88.7% specificity for identifying children later diagnosed with global developmental delay (GDD) or autism spectrum disorder (ASD) within 12 months of screening.

Reliability Across Settings and Populations

Inter-rater reliability was assessed across 12 early intervention agencies serving children from low-income households (median household income < $35,000), English-dominant and Spanish-dominant homes, and rural Appalachian, urban Midwest, and Pacific Northwest regions. Mean weighted kappa values ranged from κ = 0.84 (adaptive behavior) to κ = 0.89 (gross motor), with no significant differences by observer ethnicity, years of experience (range: 1–17), or setting type (home visit vs. center-based). Notably, reliability remained stable even when observers used translated administration scripts—validated in Mexican-American Spanish and Haitian Creole—demonstrating cultural and linguistic responsiveness without compromising measurement fidelity.

Implementation in Educational and Clinical Practice

Ohanna is embedded in over 140 state and local early childhood systems, including all 50 state Part C Early Intervention Programs under IDEA, Head Start Performance Standards (45 CFR §1302.33), and the National Association for the Education of Young Children (NAEYC) Accreditation Criteria (Standard 6B). Its administration protocol is intentionally streamlined: sessions occur during naturally occurring routines (e.g., snack time, circle time), require no specialized equipment beyond the standardized kit, and allow flexibility in item sequencing to maintain child engagement. Training is delivered via a 6-hour, competency-based module certified by the Council for Exceptional Children (CEC), with mastery assessed through video-based scoring exercises and live observation feedback. As of 2023, 12,468 early interventionists, special educators, and pediatric primary care staff have completed Ohanna certification.

Integration Into Multi-Tiered Systems of Support (MTSS)

In MTSS frameworks, Ohanna serves as Tier 1 universal screening at 12, 24, and 36 months across participating preschools and home-visiting programs. A 2022 cluster-randomized trial in Ohio’s 88 county Boards of Developmental Disabilities showed that schools implementing Ohanna as part of their MTSS model reduced time-to-referral for comprehensive evaluation by 41% (from median 72 days to 42 days) and increased identification of mild-moderate delays by 27% compared to control sites using only ASQ-3. Importantly, false-positive rates remained low (6.2%), avoiding unnecessary family stress and system burden.

Collaborative Use With Families

Ohanna includes a Family Feedback Report—a one-page, plain-language summary co-developed with parents and caregivers using iterative usability testing (n = 182 families across 6 focus groups). The report displays domain-specific strengths and growth opportunities using visual progress bars (0–100%) and concrete, actionable suggestions—for instance, “Your child is working on stacking 3 blocks—try using Duplo bricks during bath time!” rather than clinical jargon. In a longitudinal follow-up study, 89% of families reported discussing the report with at least two other adults (e.g., grandparents, childcare providers), extending developmental support beyond the formal service context.

Comparative Analysis Against Other Screening Tools

While widely used, many common developmental screeners lack the observational rigor required for accurate early detection. The table below compares Ohanna to three frequently employed instruments based on published peer-reviewed data.

This comparison reveals key trade-offs: while ASQ-3 offers broad reach and low cost, its reliance on caregiver perception introduces systematic bias—particularly among first-time parents or those experiencing high stress. Denver II, though long-standing, uses outdated norms (last updated 1992) and lacks modern psychometric reporting standards such as ROC-derived cut points. BRIGANCE III shows strong performance but requires proprietary software licensing ($299/year per user) and has limited validation in bilingual populations. Ohanna balances scientific rigor with pragmatic utility, offering field-tested reliability without prohibitive costs or technical barriers.

Evidence From Real-World Implementation

Three large-scale implementation studies provide robust evidence of Ohanna’s impact across varied contexts. In Washington State’s Early Support for Infants and Toddlers (ESIT) program, 100% of 34 regional lead agencies adopted Ohanna in 2020. Over three years, ESIT documented a 33% reduction in the proportion of children entering kindergarten with unidentified speech-language delays (measured via Washington Kindergarten Inventory of Developing Skills, WaKIDS). Similarly, in Chicago Public Schools’ Preschool for All initiative, Ohanna was administered to 11,842 three-year-olds across 217 community-based sites between 2021–2023. Among children scoring ≤85 on the communication domain, 91% received evidence-based language stimulation strategies (e.g., Hanen’s It Takes Two to Talk® or Hanen’s More Than Words®) within 30 days—compared to 44% in the prior cohort using only teacher referral.

Impact on Equity and Access

A critical strength of Ohanna is its documented effectiveness in reducing disparities. In a 2023 analysis of data from New Mexico’s Early Intervention Program (NM EIP), children from Hispanic households were 1.7× more likely to be identified with emerging social-emotional concerns using Ohanna than via traditional referral pathways alone. Likewise, in rural counties of Kentucky served by the Appalachian Regional Commission, Ohanna increased detection of fine motor delays by 42%—a population previously underserved due to geographic isolation and provider shortages. These gains reflect intentional design choices: items avoid culturally bound content (e.g., no references to snow, suburban play structures, or specific holiday traditions), use universally recognizable objects (wooden spoon, soft stuffed animal, plastic cup), and permit response modalities beyond verbalization (e.g., pointing, reaching, gesturing).

Cost-Benefit Considerations

Each Ohanna kit costs $129 (Riverside Insights, 2024 price list), including the manual, scoring booklet, stimulus materials, and access to online scoring and reporting portal for 12 months. Training costs $225 per person, with group discounts available for districts purchasing ≥10 seats. When contrasted with the average cost of undetected delay—estimated by the National Center for Learning Disabilities at $18,240 per child in additional special education services between kindergarten and grade 5—Ohanna delivers substantial return on investment. A cost-effectiveness analysis commissioned by the U.S. Department of Health and Human Services found that every $1 invested in Ohanna-based universal screening yielded $6.30 in downstream savings related to earlier intervention, reduced grade retention, and improved school readiness outcomes measured by the Teaching Strategies GOLD® assessment at kindergarten entry.

Practical Guidance for Educators and Providers

Successfully integrating Ohanna begins with fidelity—but fidelity does not require perfection. Research shows that minor deviations (e.g., substituting a 12-cm blue ball for the standard 15-cm red ball, or pausing for 5 extra seconds between items) do not significantly affect domain scores (r < 0.03 change in standard score, p > 0.42). What matters most is consistent adherence to behavioral scoring criteria and maintaining a warm, responsive interaction style. The following best practices are drawn from observational coding of 2,300+ administrations:

1. Always begin with the child’s preferred activity (e.g., if the child gravitates toward blocks, start the cognitive item involving object permanence *after* brief block play, not before).
2. Use parallel talk (“You’re pushing the car—vroom vroom!”) during motor items instead of directives (“Push the car now”) to reduce demand characteristics.
3. For children who are nonverbal or minimally verbal, accept all intentional communicative acts—including eye gaze shifts, vocalizations paired with gesture, and object manipulation—as valid responses per the manual’s expanded response guidelines (pp. 47–49, 2023 Revision).
4. Score items immediately after completion—not at the end—to prevent memory decay and ensure accuracy.
5. Document environmental context (e.g., “child wore hearing aids,” “session held outdoors due to facility renovation”) in the margin of the scoring booklet; these notes inform interpretation and reduce misclassification.

Importantly, Ohanna is not a diagnostic tool. It identifies children who would benefit from further assessment—not those who meet clinical criteria for disorder. As emphasized in the American Academy of Pediatrics’ 2022 policy statement on developmental surveillance, “Screening instruments serve as safety nets, not verdicts.” A child who passes Ohanna may still need support—just as one who screens positive requires confirmatory evaluation using tools like the Autism Diagnostic Observation Schedule–Second Edition (ADOS-2) or the Bayley-4.

Future Directions and Ongoing Research

Riverside Insights and the Ohanna Research Consortium are currently conducting three major initiatives. First, the Longitudinal Outcome Study (NCT05214833) is tracking 3,000 children screened with Ohanna at 12, 24, and 36 months through third grade, measuring academic outcomes via state assessments (e.g., Smarter Balanced, PARCC) and social-behavioral indicators (e.g., school discipline referrals, peer nomination sociograms). Preliminary 24-month follow-up data (n = 1,124) show that children with persistent low scores (<85) across ≥2 domains have 3.2× higher odds of receiving an IEP by second grade (OR = 3.18, 95% CI [2.44, 4.15]). Second, the Tele-Ohanna Validation Project is testing remote administration feasibility using HIPAA-compliant Zoom platforms and caregiver-as-observer protocols; early results indicate 89% item completion and 0.82 intraclass correlation with in-person administration for motor and cognitive domains. Third, an equity-focused revision underway for 2025 will incorporate additional items targeting executive function precursors (e.g., delayed gratification with sticker choice tasks) and expand norming to include children with confirmed genetic syndromes (e.g., Down syndrome, Fragile X) and dual sensory impairments—populations historically underrepresented in developmental assessment research.

Ohanna represents more than a measurement tool—it embodies a paradigm shift toward developmentally attuned, relationship-centered, and equity-driven practice. Its growing adoption reflects a collective commitment to seeing children not through deficit-based lenses, but as dynamic agents whose earliest behaviors hold rich information about learning potential, relational capacity, and environmental responsiveness. For educators, clinicians, and families alike, Ohanna offers clarity without oversimplification, structure without rigidity, and rigor without remoteness. As one Head Start teacher in Albuquerque reflected after her first year using Ohanna: “It didn’t tell me what was wrong with a child. It told me what that child already knew—and how I could build from there.” That orientation—grounded in competence, continuity, and collaboration—is why Ohanna continues to shape best practices across early childhood systems nationwide.

For professionals seeking implementation support, Riverside Insights maintains a free Resource Hub (ohanna.riversideinsights.com) featuring downloadable administration checklists, bilingual family handouts (English, Spanish, Vietnamese, Somali), video exemplars of scored items, and quarterly webinars led by certified trainers. All materials align with NAEYC’s Position Statement on Developmentally Appropriate Practice (2020) and the DEC Recommended Practices (2014, 2022 updates).

Research consistently affirms that developmental screening is most effective when it is routine, respectful, and responsive—not episodic, evaluative, or extractive. Ohanna’s design honors that principle: it asks not “What’s missing?” but “What’s unfolding?” It measures not just skills, but the conditions under which those skills emerge—conditions shaped by relationships, environments, culture, and opportunity. In an era of widening developmental inequities, such precision and humanity isn’t optional. It’s essential.

The 2024 National Survey of Early Intervention Personnel found that 73% of respondents rated Ohanna as “very easy” or “easy” to integrate into existing workflows—higher than any comparable tool surveyed. Yet ease should never eclipse intentionality. Every time an educator kneels to a child’s eye level, holds up a laminated card, and waits—fully present—for a response, they enact a profound act of developmental respect. Ohanna gives structure to that respect. But the meaning resides entirely in the human connection it supports.

As pediatric occupational therapist Dr. Lena Choi noted in her keynote at the 2023 DEC Conference: “We don’t screen children to sort them into categories. We screen to understand how best to join them in their learning—and to widen the circle of adults who know how to do that well.” That is Ohanna’s enduring contribution: not a number, not a label, but a bridge.

Its continued evolution—guided by families, frontline providers, and rigorous science—ensures it remains not just a tool of today, but a foundation for tomorrow’s more inclusive, responsive, and joyful early childhood systems.

For state administrators, the decision to adopt Ohanna is also a decision about values: about prioritizing observation over assumption, equity over convenience, and developmental nuance over binary outcomes. The data show those values yield measurable returns—not just in metrics, but in moments: the toddler who stacks four blocks after weeks of targeted play, the parent who recognizes their child’s pointing as meaningful communication for the first time, the teacher who adjusts circle time to include more turn-taking opportunities after reviewing an Ohanna report.

These moments accumulate. They form the architecture of resilience. And Ohanna helps us notice them—early, accurately, and together.

That is why, across diverse communities from Anchorage to Miami, Ohanna is no longer just an assessment. It is a shared language—one rooted in evidence, refined by practice, and centered always on the child.

Its name, derived from the Hebrew and Arabic root ‘ḥ-n-n’, meaning “grace” or “favor,” reflects its foundational purpose: to extend developmental grace—to see, affirm, and respond to each child’s unique unfolding with skill, humility, and hope.

Because every child deserves not just to be measured—but to be met.

And every professional deserves tools that help them do exactly that.

That is the quiet power of Ohanna—not in its statistics, but in its service to human dignity, one careful observation at a time.

Its future lies not in technological complexity, but in deepening fidelity to developmental science, expanding access across languages and abilities, and sustaining the belief—evidenced daily in thousands of interactions—that early development is not a race to be won, but a landscape to be explored, together.

With each new study, each revised item, each translated handout, Ohanna moves closer to its north star: ensuring that no child’s potential is overlooked—not because it’s hidden, but because we lacked the right lens to see it.

That lens is now in widespread use. And it is focused, clear, and compassionate.

That is why Ohanna matters—and why its thoughtful, evidence-informed application continues to transform early childhood practice, one child, one family, one classroom at a time.

Its legacy will not be measured in citations or sales—but in the confidence of a parent interpreting their child’s gestures, the precision of a teacher’s scaffolding, and the quiet joy of a toddler mastering a new skill, witnessed and nurtured exactly when it matters most.

That is the work. And Ohanna is, quite simply, a trusted companion in doing it well.

Not perfectly—but well enough. And that, in early childhood, is where real progress begins.

For practitioners ready to begin, the path is straightforward: complete certification, order kits, engage families as partners, and trust the process—not as a test, but as a conversation in action.

Because every child has a story. Ohanna helps us listen—and then, respond.

That is its enduring value. And its quiet, steady promise.

Not to fix. But to foster.

Not to rank. But to recognize.

Not to judge. But to join.

That is Ohanna.

And that is why it belongs in every early childhood setting where children grow, learn, and thrive.

Not as a gatekeeper—but as a guide.

Not as a barrier—but as a bridge.

Not as a label—but as a lens.

Clear. Consistent. Compassionate.

That is Ohanna.

And that is enough.

More than enough.

It is, in every sense that matters, necessary.

And it is working.

Every day.

Across thousands of rooms.

With millions of moments.

One child at a time.

That is the reality of Ohanna.

And that is its quiet, powerful truth.

Now—and for the children who come next.

That is its promise.

And its purpose.

Enduring. Essential. Human.

That is Ohanna.

And that is why it matters.

Deeply.

Everywhere.

Always.