Growth, Development and Health Promotion · 7 min read
Developmental Milestones, Theories and Surveillance
This chapter covers expected milestones by age, the developmental theories most often tested (Erikson and Piaget), primitive reflexes, developmental surveillance and screening, and the red flags that require prompt referral.
Developmental Theories
Erikson's psychosocial stages and Piaget's cognitive stages explain much of a child's behavior in the hospital and guide how the nurse explains, prepares and supports.
Erikson's Psychosocial Stages
| Age | Stage | What the nurse supports |
|---|---|---|
| Infant (0-1 year) | Trust vs mistrust | Consistent caregivers, prompt response to needs, parent presence |
| Toddler (1-3 years) | Autonomy vs shame and doubt | Simple choices, self-feeding, rituals, safe independence |
| Preschool (3-6 years) | Initiative vs guilt | Play, imagination, reassurance that illness is not punishment |
| School-age (6-12 years) | Industry vs inferiority | Schoolwork, tasks they can master, praise for accomplishment |
| Adolescent (12-18+ years) | Identity vs role confusion | Privacy, peer contact, participation in decisions |
Piaget's Cognitive Stages
| Age | Stage | Key features |
|---|---|---|
| Birth-2 years | Sensorimotor | Learns through senses and movement; object permanence by about 8-9 months |
| 2-7 years | Preoperational | Egocentrism, magical thinking, animism, centration; cannot reverse operations |
| 7-11 years | Concrete operational | Conservation, classification, logical thinking about concrete things |
| 11 years and older | Formal operational | Abstract and hypothetical reasoning, thinking about the future |
What these stages mean at the bedside:
Milestones by Age
Use milestones that most children (about 75% or more) achieve by a given age; a child who has not met them needs a closer look. These anchors reflect the CDC "Learn the Signs. Act Early." milestones.
Key Developmental Milestones
| Age | Gross and fine motor | Language and social |
|---|---|---|
| 2 months | Holds head up briefly on tummy | Social smile, calms when spoken to, coos |
| 4 months | Holds head steady without support when held; brings hands to mouth | Smiles to get attention, coos back, turns head toward voices |
| 6 months | Rolls front to back, reaches for toys, leans on hands to sit | Laughs, takes turns making sounds, knows familiar people |
| 9 months | Sits without support, moves objects hand to hand | Babbles (mamama, bababa), stranger awareness, looks for dropped objects |
| 12 months | Pulls to stand, cruises, pincer grasp | Waves bye-bye, says mama or dada for a parent, plays games like pat-a-cake |
| 15 months | Takes a few steps alone | Tries to say 1-2 words besides mama and dada, points to ask for something |
| 18 months | Walks alone, scribbles, feeds self with fingers | Tries to say 3 or more words, follows one-step directions without gestures |
| 2 years | Kicks a ball, runs, eats with a spoon | Says at least 2 words together ("more milk"), points to things in a book |
| 3 years | Draws a circle when shown, uses a fork | Talks in conversation with at least 2 back-and-forth exchanges |
| 4 years | Catches a large ball most of the time, draws a person with 3 or more parts | Says sentences of 4 or more words, tells what comes next in a story |
| 5 years | Hops on one foot, buttons some buttons | Tells a simple story, counts to 10 |
Other commonly tested motor anchors: most children ride a tricycle around age 3, copy a cross around 4 and a triangle around 5, and ride a bicycle without training wheels and tie shoes around 5-7 years.
Clinical Pearl: Toilet training readiness signs include staying dry for about 2 hours, interest in the toilet, ability to communicate the need to go, ability to pull pants up and down and to walk to the bathroom. Most children train between about 2 and 3 years. Regression in toileting during hospitalization or after a new sibling is common and temporary.
Primitive Reflexes
Newborn reflexes appear and disappear in a predictable order. A reflex that is absent, asymmetric or persists beyond the expected age suggests a neurologic problem.
Primitive Reflexes
| Reflex | How elicited | Typically disappears |
|---|---|---|
| Moro (startle) | Sudden loss of support; arms extend then flex | About 4-6 months |
| Rooting | Stroke cheek; turns toward the touch | About 4 months |
| Palmar grasp | Object placed in palm | About 3-4 months |
| Plantar grasp | Pressure on the sole | About 8-12 months |
| Asymmetric tonic neck (fencing) | Head turned to one side | About 4-6 months |
| Stepping | Held upright with feet on a surface | About 2 months |
| Babinski | Stroke sole; toes fan and big toe extends | By about 12-24 months |
An asymmetric Moro reflex in a newborn may indicate a brachial plexus injury or a fractured clavicle; report it.
Developmental Surveillance and Screening
Surveillance is ongoing: at every visit, the nurse asks about parent concerns, observes the child, and compares skills with milestones. Screening uses a standardized validated tool at set ages. Current AAP recommendations call for general developmental screening at the 9-, 18- and 30-month visits, and autism-specific screening (for example, the M-CHAT-R/F) at 18 and 24 months, plus any time there is a concern.
Parent concern is a strong predictor of a real delay. "Wait and see" is not an appropriate response to a parent who is worried about speech, motor skills or social engagement.
Developmental Red Flags That Need Prompt Referral
| Age | Red flag |
|---|---|
| Any age | Loss of previously acquired skills (speech, social or motor) |
| 2 months | No response to loud sounds, no social smile by about 2-3 months |
| 4-6 months | Persistent head lag, does not bring hands to mouth, no rolling by about 6 months |
| 9 months | Not sitting without support, no babbling |
| 12 months | No babbling, no gestures (pointing, waving), not bearing weight on legs |
| 16-18 months | No single words, not walking, does not point to show interest |
| 24 months | No two-word phrases, does not imitate actions or words |
| Before 18 months | Strong hand preference (may signal weakness on the other side) |
Exam Tip: Loss of skills (regression) at any age is never "normal" and always requires prompt referral. Expect a case in which a parent says a toddler "used to say several words and stopped talking." The correct response is to document, report and refer for developmental and hearing evaluation, not to reassure.
Signs that may suggest autism spectrum disorder include limited eye contact, not responding to name by 12 months, not pointing to show interest by about 14-18 months, not engaging in pretend play by 18 months, repetitive movements, intense reactions to sensory input and loss of language or social skills. Any concern leads to referral for diagnostic evaluation and to early intervention, without waiting for a diagnosis.
Hearing evaluation is part of every speech delay workup, because hearing loss is a common, treatable cause of delayed language.
Case Snapshot: A 20-month-old is admitted with pneumonia. During the admission history, the parent mentions the child "says no real words, just babbles," and does not wave or point. The nurse documents the findings using the parent's own words, notifies the provider and recommends referral to early intervention and audiology. Lack of words by 16-18 months and lack of gestures are red flags, and an inpatient stay is still an appropriate time to start the referral.
Key Takeaways
Erikson: trust, autonomy, initiative, industry, identity; Piaget: sensorimotor, preoperational, concrete operational, formal operational.
Preschoolers' magical thinking means they may see illness as punishment; correct this directly.
Standardized developmental screening is done at 9, 18 and 30 months, autism screening at 18 and 24 months.
Loss of skills at any age, no babbling by 12 months and no words by 16-18 months are red flags.
Persisting or asymmetric primitive reflexes need to be reported.
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