Is there still a cognitive cost of being a twin in the UK?

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The impact of pre‐school on young children's cognitive attainments at entry to reception

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Twin‐Sibling Differences in Parental Reports of ADHD, Speech, Reading and Behaviour Problems

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An investigation of the difference in measured intelligence between twins and single births*

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Comparison of academic performance of twins and singletons in adolescence: follow-up study

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