Standardized Screening Tools and Referral Processes

What Is Developmental Screening?

Developmental screening is a brief, structured process used to identify children who may need further evaluation. It is not a diagnosis. A screening tool is like a smoke detector: it signals that something may need closer attention, but it does not tell you exactly what is wrong or how serious it is. Common standardized screening tools used in early childhood settings include the Ages and Stages Questionnaires (ASQ-3), the Ages and Stages Questionnaires: Social-Emotional (ASQ:SE-2), and the Modified Checklist for Autism in Toddlers, Revised (M-CHAT-R). The American Academy of Pediatrics (AAP) recommends that developmental surveillance occur at every well-child visit and that standardized screening be conducted at the 9-, 18-, and 30-month visits, with autism-specific screening at 18 and 24 months.

Screenings are typically short (10–20 minutes), are completed by parents, caregivers, or trained early childhood educators, and produce a score that places a child in a category such as "typical," "monitoring zone," or "concern." A screening result in the concern range means the child should be referred for a fuller evaluation — nothing more and nothing less.

What Is Diagnostic Assessment?

Diagnostic assessment is a comprehensive, in-depth evaluation conducted by a licensed or credentialed professional — such as a psychologist, speech-language pathologist, developmental pediatrician, or early intervention specialist. Its purpose is to determine whether a delay or disability exists, what it is, and how it affects the child's functioning. Diagnostic assessment uses standardized tests, clinical observations, detailed developmental histories, and input from multiple sources. It results in a formal diagnosis or eligibility determination and directly drives decisions about intervention, therapy, and special education services.

The key differences between screening and diagnostic assessment are purpose, administrator, time, and what decisions follow. Screening says, "Look more closely." Diagnostic assessment says, "Here is what we found and what to do about it."

Your Role as a Preschool Teacher

As an early childhood educator, your legal and ethical role is to observe, document, and refer — not to diagnose. You may administer certain caregiver-report or educator-completed screening tools if you are trained to do so and if your program authorizes it. You must never tell a family that their child "has" autism, an intellectual disability, or any other condition. What you can and should do is share your observations factually, express concern with care, and guide families toward appropriate next steps.

Confidentiality is essential. Screening results are part of a child's educational record and are protected under the Family Educational Rights and Privacy Act (FERPA). Share information only with those who have a legitimate educational need and with parental consent, as required.

The Referral Process: Step by Step

When a screening result falls in the concern range or when ongoing observation suggests a child is not meeting developmental milestones, follow this process:

1. Document your observations. Use objective, behavior-based language. Write what you see, not what you conclude. "Marcus did not follow a two-step direction during three separate activities this week" is appropriate; "Marcus seems cognitively delayed" is not.

2. Consult your program supervisor or director. Most programs have a protocol. Follow it. Do not contact outside agencies without authorization.

3. Meet with the family. Schedule a private, unhurried conversation. Share your observations and the screening result honestly and respectfully. Use plain language. Bring a translator or interpreter if needed. Avoid jargon and avoid alarm.

4. Explain available resources. For children birth to age 2, families can contact their state's early intervention program under IDEA Part C, which provides evaluation and services at no cost to the family. For children ages 3–21, services are governed by IDEA Part B, and referrals go through the local education agency (LEA), typically the local school district.

5. Obtain written consent. Before any evaluation occurs, the family must give informed written consent. You cannot refer a child for evaluation without it.

6. Follow up. Check in with the family. Document the conversation, any referrals made, and any responses received. If a family declines a referral, document that as well and continue to monitor.

IDEA Part C and Part B: A Brief Overview

The Individuals with Disabilities Education Act (IDEA) guarantees eligible children with disabilities the right to a free appropriate public education (FAPE) and early intervention services. Part C covers infants and toddlers from birth through age 2 and focuses on services delivered in natural environments (home, childcare). Part B covers children ages 3 through 21 and is administered through public schools. Once a referral is made under either part, the law sets specific timelines for evaluation and eligibility determination. Families have rights throughout this process, including the right to an independent educational evaluation.

Safety and Ethical Considerations

Misuse of screening tools can cause real harm. Over-referring can alarm families unnecessarily and strain limited resources. Under-referring delays services that a child urgently needs. Always use tools as they were designed and normed to be used. Never administer a tool you have not been trained on. Be aware of cultural and linguistic bias: some screening tools perform differently across cultural groups, and results should always be interpreted alongside direct observation and family input. When in doubt, consult a supervisor.