Are personality traits important? - People

The Origin of Personality
Infants also differ in how they react to novel, ambiguous,
and stressful situations.
Reactions often correlate with many of the same outcomes
predicted by personality factors:
infants’ negative reactions to novelty, for example, predicted
their internalization of negative events (“This bad thing
happened because I’m just bad”) in middle childhood;
infants’ negative emotionality predicted their internalization
and “acting out” in middle childhood.