It seems to be. In the West, the Big Five model of personality traits and related models were developed to broadly map out personality differences, and they have been tested successfully in multiple countries. But research suggests that in some cultures, the Big Five traits are not necessarily the best way to describe how people perceive individual differences. Scientists have also found that associations between personality traits and outcomes that appear in some cultures may not be universal. For example, while more extraverted North Americans appear to be happier, on average, extraverts may not have the same advantage elsewhere.