Which example illustrates normative history-graded influence?

• A. Starting school at a typical age
• B. A cohort-wide event such as an economic recession
• C. Learning to ride a bicycle
• D. Getting vaccinated in infancy

Answer: (B)

Normative history-graded influences are experiences that affect a broad group of people who share the same historical era, shaping development in ways tied to that time period rather than to age or a personal milestone. A cohort-wide event like an economic recession fits this idea because it impacts many individuals born around the same time, influencing opportunities, education, career paths, and family formation in ways that are shared across that generation.

Starting school at a typical age is more about normative age-graded influence—timing based on age norms—rather than a historical moment affecting a specific cohort. Learning to ride a bicycle is a personal developmental milestone not anchored to a shared historical context, and getting vaccinated in infancy is an age-related health practice common across many eras and not defined by a particular historical event.