Developmental monitoring

Monitoring follows development in ordinary life

The current CDC developmental monitoring page describes monitoring as observing how a child changes over time in play, learning, speech, action, and movement. Parents, grandparents, other caregivers, and early childhood providers can participate. Brief milestone checklists can help organize observations and conversations.

Useful monitoring is broader than checking boxes. It records what the child does, wants, enjoys, avoids, and communicates; which supports are available; how partners respond; and whether the pattern changes across settings or time. It also preserves strengths and progress instead of becoming a running list of perceived deficits.

The word surveillance often appears in health care. The AAP developmental surveillance clinical report, reaffirmed with reference updates in 2024, describes a professional longitudinal process that includes family concerns, developmental history, observation, risk and protective factors, documentation, and exchange of information with other professionals. Everyday monitoring and clinical surveillance overlap, though their roles and decision authority differ.

Monitoring and screening are different processes

The CDC autism screening guidance distinguishes developmental monitoring, developmental screening, autism-specific screening, and diagnosis. A milestone note can prompt screening. A screening result can support evaluation. Each step retains its own evidence and qualified decision-maker.

Monitoring should continue after a normal screen, a diagnosis, or the start of services. Development changes, and a tool can miss a concern. A new health or access problem can also look like a developmental change.

Milestone checklists support conversation

The 2022 AAP evidence-informed milestone paper explains that the revised CDC checklist milestones were selected as skills expected in at least 75% of children by the stated age when data supported a threshold. The lists were designed for surveillance conversations, not risk classification or diagnosis.

A “not yet” response becomes one piece of information. Record the child's age, opportunity, languages, communication forms, setting, partners, and supports. Ask whether hearing, vision, movement, illness, pain, sleep, medication, stress, or unfamiliar demands affected the observation. Avoid converting one item into a prognosis.

Autistic development needs respectful monitoring

For an autistic person, monitoring can follow communication access, self-advocacy, relationships, interests, daily living, learning, health, joy, stress, and participation. The goal is useful support and a better fit between person and environment. Monitoring should not reward masking, forced eye contact, quiet hands, pain tolerance, or compliance with every adult request.

Record the person's own perspective in an accessible form. The ASHA AAC practice portal says AAC users should always have access to their tools or devices. Missing AAC, sensory support, mobility access, or a familiar partner is an environmental condition, not evidence that the person lacks a skill.

When assent applies, include accessible ways to accept, decline, pause, and withdraw. Family priorities matter, and they should not replace the person's reliable communication.

A simple monitoring record

For each observation, capture:

• date, routine, setting, and people present
• the specific observable skill, communication, or change
• the number and definition of relevant opportunities
• support, prompt, AAC, language, sensory, and motor conditions
• health, sleep, pain, medication, or other context that may matter
• what the person communicated about comfort, choice, or difficulty
• what adults did next and whether follow-up is due

Use raw counts with any percentage. Keep missing opportunities and access failures visible. A video or recording requires appropriate consent, a secure approved system, and defined access, retention, and deletion. Many useful observations need no recording at all.

The current CDC family action page recommends sharing concerns with the child's doctor and asking about developmental screening. It also directs families to state early-intervention services for children under three and the public school system for children three and older. Program eligibility and medical conclusions remain separate decisions.

A fictional monitoring example

Mina is a fictional four-year-old who uses speech, gesture, and AAC. Her family wants unfamiliar adults to recognize her stop and help messages during community activities. They define an eligible opportunity as a clear need for help or a pause while AAC is within reach.

Across six outings, AAC is available during 10 of 14 possible opportunities. Mina sends a recognizable message in 7 of 10 eligible opportunities. Partners respond within 15 seconds after 4 of 7 messages. The four moments without AAC remain access failures; they are not counted as failed child responses.

This record suggests separate questions about AAC availability, Mina's message, and partner responsiveness. It does not establish a diagnosis, developmental delay, intervention effect, or cause. The family shares the pattern with Mina and her clinicians, adds the missing access support, and continues monitoring whether the routine feels workable to her.