Which has NOT been proposed as a key factor in explaining why personality is so stable across the lifespan?

Name: Which has NOT been proposed as a key factor in explaining why personality is so stable across the lifespan?
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Question

Quizplus · Accepted Answer

While heredity, lasting effects of childhood, and the stability of environments have all been proposed as key factors in explaining why personality is so stable across the lifespan, biological factors like diseases have not been considered a key factor in this stability.

Which Has NOT Been Proposed as a Key Factor in Explaining