Stranger anxiety is a normal developmental stage that typically becomes fully developed by 32 weeks (around 8 months).
This fear of strangers is linked to the infant's cognitive progress, specifically the ability to differentiate familiar caregivers from unfamiliar individuals.
At this age, when a stranger approaches, the infant may cry, become fussy, or cling tightly to their parent for security.
This phenomenon is so common at this age that it is often referred to as 'eight-month anxiety'.
Why Other Options Were Wrong
Option A: While initial wariness can begin around 26 weeks (6 months), prominent and fully developed stranger anxiety is characteristic of a slightly older infant.
Option B: Newborns lack the cognitive development and visual acuity to recognize and differentiate specific people, so they cannot experience stranger anxiety.
Option D: At 3 months, infants are typically in a highly social phase, characterized by the emergence of the social smile and positive reactions to human faces, not fear.
Related Visual
Visual 1: Timeline Chart - A visual timeline illustrating the key social and emotional milestones of an infant's first year, highlighting the periods for social smile, stranger anxiety, and separation anxiety.
Visual 2: Infographic - An infographic showing a baby at 8 months clinging to a parent while looking warily at a stranger, with text boxes explaining the cognitive reasons for this behavior.
Clinical Relevance
Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Infant developmental milestones: Stranger anxiety as background academic context rather than a clinical decision trigger.
Anticipating stranger anxiety is crucial for healthcare professionals to provide compassionate and effective care. An infant's distress can make physical examinations, vital sign measurements, and procedures difficult.
To manage stranger anxiety during a clinical encounter, a nurse should first interact with the parent, allow the child to observe from a safe space (like the parent's lap), use a soft voice, and avoid sudden movements.
What if? If a 2-year-old exhibits intense, inconsolable distress with strangers that interferes with daily activities, it may be more indicative of a persistent anxiety issue or a temperamental trait rather than typical stranger anxiety, warranting further developmental screening.
How to Approach the Question
Identify the core concept being tested, which is a specific developmental milestone in infancy (stranger anxiety).
Recall the typical age ranges for major infant milestones. Think of development as a sequence: social smile precedes stranger anxiety, which precedes peak separation anxiety.
Evaluate each option based on this developmental timeline.
Eliminate options that are clearly incorrect. Newborns (Birth) and 3-month-olds lack the cognitive ability for this fear.
Differentiate between the onset of a behavior and its peak. Wariness may start around 6 months, but the classic, fully developed 'stranger anxiety' is known to peak around 8-9 months.
Select the option that best represents the established and most prominent period for the milestone.