American Board of Psychiatry and Neurology (ABPN) Practice Exam 2026 - Free ABPN Practice Questions and Study Guide

Question: 1 / 1275

At 8 months old, a child's temperament is most likely a function of what?

Biological factors

At 8 months old, a child's temperament is primarily influenced by biological factors. At this age, infants start to exhibit distinct temperamental characteristics that are largely innate and developmental. Research in child development has shown that temperament, which encompasses traits such as emotional reactivity, adaptability, and attention span, is significantly shaped by genetic and biological predispositions.

While environmental factors, such as the parents' culture or family dynamics, do play a role in shaping behavior and responses over time, the fundamental aspects of temperament are observable even in early infancy and are predominantly derived from biological influences. Therefore, the most accurate answer highlights the critical role that biological factors play in determining the temperamental traits of an infant, particularly at such a young age.

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The parents' culture

The grandmother's influence

The baby's birth month

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