Developmental screening

Screening takes a standardized closer look

The current CDC developmental monitoring and screening page describes screening as more formal than everyday monitoring. A research-based questionnaire or checklist asks about areas such as language, movement, thinking, behavior, and emotions. The tool is administered, scored, and interpreted according to its evidence and instructions.

Developmental screening is broad. Autism screening targets characteristics associated with autism. A child may receive both at the same visit, and either result may lead to a different follow-up question.

The CDC autism screening page states that screening tools do not diagnose autism. It lists examples of tools without endorsing one. Permission to hand out or score a screen does not confer authority to make a medical diagnosis.

Routine ages are checkpoints

CDC and the AAP developmental surveillance report identify routine general developmental screening at 9, 18, and 30 months. Autism-specific screening is recommended at 18 and 24 months. These schedules are preventive-care checkpoints for young children without an already identified concern.

Screening can occur at other times when a family, clinician, caregiver, or educator raises a concern. A missed routine screen can be completed at a later visit using a tool appropriate for the child's current age. Older children need age-appropriate processes; a toddler tool should not be stretched beyond its validated range.

The current AAP surveillance, monitoring, and screening page says increased likelihood identified through screening or surveillance warrants referral for diagnostic evaluation. It also supports intervention for identified developmental delays while an autism evaluation proceeds. The qualified treating and evaluating professionals retain their respective decisions.

Tool fit affects interpretation

Before interpreting a result, confirm:

• the exact tool, edition, form, age range, and cutoff used
• who completed it and how well that person knows the child
• the authorized language version and any interpreter role
• unanswered or changed items and deviations from instructions
• hearing, vision, motor, sensory, health, literacy, and communication access
• the setting, recent events, cultures, and languages represented
• the tool's sensitivity, specificity, validation sample, and intended use

Sensitivity is the proportion of people with the reference condition whom the tool classifies as higher likelihood in a validation study. Specificity is the proportion without that reference condition whom it classifies as lower likelihood. Predictive values also depend on population and setting. These group measures do not give certainty for one child.

Use an authorized translation with evidence for its intended use. An interpreter may support communication without rewriting items or scoring rules. Document any deviation so the professional can decide whether the result remains interpretable.

Communication access belongs in the process

A screen should allow the family and child to use their usual communication supports. The ASHA AAC practice portal says people who use augmentative and alternative communication should always have access to their tools or devices. Do not remove AAC to see whether speech appears.

Include the child's own report when possible. Family knowledge adds history and context; it does not authorize another person to supply the child's answer when the item calls for direct performance or self-report. Record who provided each kind of evidence.

Every result needs a follow-up plan

Ask the responsible professional:

• What classification did the tool produce, using the manual's exact language?
• Does the tool require a follow-up interview, repeat item, or other step?
• Which developmental, medical, hearing, vision, communication, or educational questions remain?
• Which referrals can start now, and who owns each one?
• What should the family monitor while waiting?
• Which new signs require an earlier visit or urgent care?

The current CDC family concern page directs families to share concerns with a clinician and ask about screening. It also describes contacting the state early-intervention system for a child under three or the public school system for an older child. The U.S. Department of Education Part C page explains that states operate early-intervention systems for eligible infants and toddlers. Eligibility, medical diagnosis, payer authorization, and clinical recommendations remain separate decisions.

A fictional screening visit

Nadia is a fictional 18-month-old whose family uses Arabic and English. Her parent completes an authorized Arabic version of a validated general developmental screen. A qualified interpreter supports discussion and does not change the items or score. The result falls in the tool's referral range for communication and motor follow-up.

The clinician records the tool, form, language, respondent, interpreter role, unanswered items, access supports, score, classification, and manual-directed next step. The clinician also considers hearing, vision, health, movement, communication, and developmental evaluation. The family contacts its state early-intervention program while those appointments are pending.

The classification has no child-opportunity denominator and is not Nadia's personal probability of a diagnosis. It cannot identify a cause or prescribe a treatment. The family keeps Nadia's gestures, play, AAC, languages, and strengths visible in every follow-up conversation.