researcher finds in a longitudinal study that her subjects are significantly more open to new experiences at age 50 than they were at 30. This change most likely reflects _______.

Question

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The finding that participants are more open to new experiences at age 50 than they were at 30 suggests a developmental change. This suggests that individuals have changed over time and have become more open-minded, rather than this being the result of cohort differences (A), the nature-nurture dichotomy (B), or attrition (D).

Researcher Finds in a Longitudinal Study That Her Subjects Are