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The IQ advantage of the heavier twin
Author(s) -
James William H.
Publication year - 1982
Publication title -
british journal of psychology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.536
H-Index - 92
eISSN - 2044-8295
pISSN - 0007-1269
DOI - 10.1111/j.2044-8295.1982.tb01833.x
Subject(s) - psychology , developmental psychology , monozygotic twin , intelligence quotient , twin study , cognition , psychiatry , evolutionary biology , genetics , heritability , biology
The monozygotic twin member with the larger birth weight later has a slight IQ advantage over the lighter co‐twin. The question arises whether this is due to interconnected foetal circulations (which in extreme cases cause the twin transfusion syndrome). An attempt is made to clarify this hypothesis.