By Emma Young
We’re all familiar with the “Big Five” model of personality, which measures the traits of conscientiousness, agreeableness, extraversion, neuroticism, and openness. But what drove the evolution of these personality domains? And how do animal personalities compare with ours? Answers to the second question can help to answer the first. And now a major new study of personality in bottlenose dolphins, published in the Journal of Comparative Psychology, has found that in some key ways, dolphin personality is like ours; in others, though, it is not.
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