At what age does a child normally develop 'social smile' milestone?

AIIMS Bhopal NO - 2018 (Shift-1st)

Child Health Nursing (Pediatrics)

Easy

Appeared in: AIIMS Bhopal NO - 2018 (Shift-1st)

Explanation

The social smile is a purposeful, responsive smile that signals an infant's engagement with their environment and caregivers.
According to pediatric developmental charts, this milestone typically emerges between 6 to 8 weeks of age, which corresponds to the 2-month check-up.
This is distinct from the reflexive or spontaneous smiles seen in newborns, which are not a response to social interaction.

Option A: 16 weeks (4 months) is too late for the initial appearance of a social smile. By this age, an infant should have a well-established social smile and typically begins to laugh out loud.
Option B: While some fleeting, reflexive smiles may occur at 4 weeks (1 month), the consistent and purposeful social smile in response to a person is not yet developed. The infant's vision and social awareness are still maturing.
Option C: 12 weeks (3 months) is past the typical window for the onset of the social smile. An infant who has not developed a social smile by this age may need a developmental assessment.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Infant developmental milestones: Social Smile as background academic context rather than a clinical decision trigger.
Nurses are responsible for assessing developmental milestones during well-child visits. Using standardized screening tools helps in the early identification of any developmental delays.
Educating parents about upcoming milestones, like the social smile, empowers them to engage in appropriate stimulation and bonding activities with their infant.
A significant delay in the social smile (absent by 3 months) is a clinical red flag. The nurse should document this finding and ensure the infant is referred for further evaluation for potential visual, neurological, or developmental disorders.

How to Approach the Question

This is a factual recall question about a specific developmental milestone.
First, identify the key term in the question: 'social smile'.
Recall the standard timeline for major infant milestones. These are often grouped by months (e.g., 2, 4, 6, 9, 12 months).
Convert the options, which are in weeks, into months for easier comparison (4 weeks ≈ 1 month; 8 weeks ≈ 2 months; 12 weeks ≈ 3 months; 16 weeks ≈ 4 months).
The social smile is one of the earliest social milestones, typically appearing around the 2-month mark.
Select the option that corresponds to this timeframe, which is 8 weeks.

Concept Tested & Keywords

Concept Tested: Infant developmental milestones: Social Smile
Stem keywords: child, social smile, milestone, age
Lead-in keywords: At what age
Clinical cues: Age/sex group narrows the expected diagnosis, intervention, or normal reference range.
Negative lead-in flag: false

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E6 Ghai Essential Pediatrics(pp 26-904 of 913) p. 32-34

E6 Kaplan Sadock's Synopsis of Psychiatry-2022 (pp 1-3768 of 3768) pp. 2803-2805, 2792-2794