DAYC-2 Report Write-Up: Structure, Sample Language & Common Errors

Whatever the child's state says, and nothing else. Standard scores map cleanly onto SD-based rules (85 is 1 SD below the mean, 77.5 is 1.5 SD, 70 is 2 SD, with the state's own rounding convention deciding whether the 1.5 SD line is written 77 or 78), but the rules themselves vary enormously: a 2026 federal technical-assistance review counted 19 jurisdictions at 2 SD in one area, 19 at 1.5 SD in two or more areas, 18 at a 25 percent delay, and a tail of other criteria, with most states offering several routes. So there is no universal DAYC-2 cutoff, no fixed percentile that means delay everywhere, and the defensible write-up quotes the named jurisdiction's current criterion and applies it in its own currency, reporting the exact standard score with its confidence band and letting the state's rounding rule govern the boundary. Eligibility itself then belongs to the multisource, multidisciplinary process, not to the score.

No, and treating them as interchangeable is the field's costliest write-up error. A standard score locates the child within the normative distribution for their exact age; percent delay divides an age-equivalent shortfall by chronological (or corrected) age, treating developmental months as an equal-interval ruler, which they are not: age equivalents have unequal intervals, no error band, and thin floors in infancy, so a 25 percent delay at 12 months and at 48 months describe very different standardized positions. A 2026 peer-reviewed analysis across six early-intervention tests found 2,445 score combinations where percent-delay rules could deny services despite qualifying standard scores and 3,037 where they could qualify children within typical variation. When a state's rule requires percent delay, apply it as written and label it as the state's administrative method; when standard scores exist, some states expressly prefer them. What a report never does is compute one metric and announce it as the other.

Mechanically yes, and the report must say so wherever it happened. The publisher expressly permits three information-gathering methods (observation, caregiver interview, direct assessment), domains can be administered separately, and arena or multidisciplinary use is part of the design, which is why a toddler who will not engage at a table does not automatically defeat the evaluation. But no published study establishes that interview-only scores are equivalent to directly assessed ones, so the defensible write-up labels every domain's source, corroborates reported skills through observation, routines, and records where possible, and never presents a caregiver's account as examiner-observed performance. The federal overlay adds the rest: a Part C eligibility evaluation must include parent history, functioning across all areas, other sources as needed, and records, so the process can never reduce to one interview-scored instrument, whatever the instrument permits.

Completely, because the correction is state policy rather than a manual rule, and states genuinely differ. Report the gestational age at birth, the degree of prematurity, the chronological age, the corrected age, the exact formula used, the policy that authorizes it, which scores and decisions used which age, and whether the eligibility conclusion changes under the other age. The differences are not cosmetic: a common convention corrects until 24 months of chronological age, one state deducts only half the prematurity for up to 12 months (longer on physician recommendation), and others tie prematurity-based eligibility to referral timing, so "corrected for prematurity" standing alone leaves the next evaluator unable to reproduce the arithmetic. When the manual convention and the state rule differ, the state's eligibility policy governs the eligibility analysis, and the report says which rule it followed rather than silently choosing the age that produces the preferred outcome.

No. Federal law prohibits any single procedure from serving as the sole criterion: the evaluation must include an instrument, child history and parent interview, functioning in all five developmental areas, information from other sources where needed, and record review, and qualified personnel must apply informed clinical opinion. That opinion runs one direction only: it can independently establish eligibility when scores miss a real delay (with the report documenting what the scores failed to capture and the functional evidence), but it can never be used to negate a qualifying instrument result because the team feels the child seems fine. The determination belongs to the multidisciplinary team applying the state's definition, inside the 45-day referral-to-IFSP window, at no cost to the family. The same logic governs moves: the evidence travels, the determination does not, and a receiving state re-decides under its own rule, which is why the write-up preserves scores, bands, sources, ages, and the originating criterion.

By referral needs and program acceptance, not by a universal ranking. The DAYC-2's strengths are speed (10 to 20 minutes per domain), naturalistic and arena administration, domain-by-domain flexibility, caregiver-knowledge integration, and birth-through-5:11 coverage; its costs are 2009-to-2011 norms, permissive sourcing that demands method labeling, and the absence of validation against any Bayley edition. The Bayley-4 is the tightly standardized direct-assessment alternative for infants and toddlers through 42 months: slower, materials-bound, and only moderately correlated with the DAYC-2, with structured administration reading lower for some children. The BDI-3 is the other full eligibility battery, broader in age and often embedded in statewide infrastructure; program acceptance can decide the matter outright, as in Texas, where the state names the BDI-3 with the DAYC-2 permitted under specific contracts. Many strong evaluations pair a broad eligibility battery with discipline-specific direct assessment.

Yes. Give it the facts (ages and any correction arithmetic, domains administered with each one's method, standard scores with confidence bands, the state or program rule, observations, and family-reported information) and it drafts the results section: sources labeled per domain, uncertainty reported, scatter handled before the composite, the eligibility analysis in the rule's own currency, and a plain-language family summary, ready for your review. It can also cross-check a finished report for interview scores presented as observed, a GDI without five domains, a percent-delay conversion, an unquoted rule, or a bare corrected-age claim, and it can draft the interstate or transition variants that preserve the evidence for the next team. BastionGPT is HIPAA-compliant with a signed BAA on every plan, and your data is never used to train models.