Certificate In Psychology (CPSY) Practice Exam

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By 1 year of age, the percentage of a child's body that is the head is about:

20 percent.
25 percent.
6 percent.
12 percent.

The correct answer is: 20 percent.

At around 1 year of age, a child's body proportions have undergone significant changes since birth. While at birth, the head accounts for a much larger percentage of the overall body size, by the time a child reaches 1 year, the percentage of the body that is the head typically decreases to about 20 percent. This shift occurs as the body grows more rapidly than the head during early development, which is a common pattern in human growth. Understanding body proportions in infants and toddlers is important in developmental psychology, as it provides insight into physical growth patterns and can also indicate healthy development. The other percentages presented do not align with typical growth data for a 1-year-old, making 20 percent the most accurate estimate for the proportion of a child's body that is made up of the head at this age.