If more people understood the complicated dynamics between identical twin girls, the public might be less inclined to treat them as a unit and lump them together. When I work with adult female MZ (monozygotic, or identical) twins, I am amazed and dismayed at their underdeveloped and unsophisticated knowledge of themselves and one another. Since they have had few opportunities to be separate and have primarily shared a peer group, they are shockingly unaware of their personality differences until an external event […]

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