ATI Pediatrics Health Promotion Study Guide 2026 |Questions
|Answers |Rationales
1. By which age should an infant double their birth weight?
A. 6 months
B. 4 months
C. 9 months
D. 12 months
Answer: A
Rationale: Most infants double their birth weight by 6 months of age and triple it by 12
months.
2. When does the posterior fontanel typically close?
A. 12 to 18 months
B. 6 to 8 weeks
C. 4 to 6 months
D. 2 years
Answer: B
Rationale: The posterior fontanel closes early, usually between 6 and 8 weeks of age, while
the anterior fontanel closes between 12 and 18 months.
,3. An infant should be able to sit unsupported by which age?
A. 4 months
B. 6 months
C. 10 months
D. 8 months
Answer: D
Rationale: By 8 months, infants can usually sit unsupported. At 6 months, they often sit
with support.
4. According to Piaget, which stage of cognitive development is a 10-month-old
infant in?
A. Preoperational
B. Concrete operational
C. Sensorimotor
D. Formal operational
Answer: C
Rationale: Infants from birth to 24 months are in the sensorimotor stage, where they learn
through their senses and motor activities.
5. Which Erikson stage of psychosocial development applies to an infant?
A. Autonomy vs. Shame and Doubt
B. Trust vs. Mistrust
C. Initiative vs. Guilt
D. Industry vs. Inferiority
Answer: B
Rationale: Infancy (birth to 1 year) is the stage of Trust vs. Mistrust, where they learn to
trust that their basic needs will be met.
, 6. At what age is a child expected to use a crude pincer grasp?
A. 5 months
B. 9 months
C. 7 months
D. 12 months
Answer: B
Rationale: A crude pincer grasp is typically achieved by 9 months. A neat pincer grasp
usually develops by 11 months.
7. When should the first dose of the Measles, Mumps, and Rubella (MMR)
vaccine be administered?
A. Birth
B. 12 to 15 months
C. 6 months
D. 2 months
Answer: B
Rationale: The first MMR and Varicella vaccines are given between 12 and 15 months of
age.
8. Which solid food is typically introduced first to an infant?
A. Mashed bananas
B. Iron-fortified cereal
C. Strained carrots
D. Pureed chicken
Answer: B
Rationale: Iron-fortified cereal is usually introduced first, between 4 to 6 months, because
fetal iron stores begin to deplete.
|Answers |Rationales
1. By which age should an infant double their birth weight?
A. 6 months
B. 4 months
C. 9 months
D. 12 months
Answer: A
Rationale: Most infants double their birth weight by 6 months of age and triple it by 12
months.
2. When does the posterior fontanel typically close?
A. 12 to 18 months
B. 6 to 8 weeks
C. 4 to 6 months
D. 2 years
Answer: B
Rationale: The posterior fontanel closes early, usually between 6 and 8 weeks of age, while
the anterior fontanel closes between 12 and 18 months.
,3. An infant should be able to sit unsupported by which age?
A. 4 months
B. 6 months
C. 10 months
D. 8 months
Answer: D
Rationale: By 8 months, infants can usually sit unsupported. At 6 months, they often sit
with support.
4. According to Piaget, which stage of cognitive development is a 10-month-old
infant in?
A. Preoperational
B. Concrete operational
C. Sensorimotor
D. Formal operational
Answer: C
Rationale: Infants from birth to 24 months are in the sensorimotor stage, where they learn
through their senses and motor activities.
5. Which Erikson stage of psychosocial development applies to an infant?
A. Autonomy vs. Shame and Doubt
B. Trust vs. Mistrust
C. Initiative vs. Guilt
D. Industry vs. Inferiority
Answer: B
Rationale: Infancy (birth to 1 year) is the stage of Trust vs. Mistrust, where they learn to
trust that their basic needs will be met.
, 6. At what age is a child expected to use a crude pincer grasp?
A. 5 months
B. 9 months
C. 7 months
D. 12 months
Answer: B
Rationale: A crude pincer grasp is typically achieved by 9 months. A neat pincer grasp
usually develops by 11 months.
7. When should the first dose of the Measles, Mumps, and Rubella (MMR)
vaccine be administered?
A. Birth
B. 12 to 15 months
C. 6 months
D. 2 months
Answer: B
Rationale: The first MMR and Varicella vaccines are given between 12 and 15 months of
age.
8. Which solid food is typically introduced first to an infant?
A. Mashed bananas
B. Iron-fortified cereal
C. Strained carrots
D. Pureed chicken
Answer: B
Rationale: Iron-fortified cereal is usually introduced first, between 4 to 6 months, because
fetal iron stores begin to deplete.
