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Oliver, Bonamy; Dale, Philip S.; Plomin, Robert – Journal of Child Language, 2004
We investigated infant precursors of low language scores in early childhood. The sample included 373 probands in 130 monozygotic (MZ) and 109 same-sex dizygotic (DZ) twin pairs in which at least one member of the pair scored in the lowest 15th percentile of a control sample on a general language factor derived from tester-administered tests at…
Descriptors: Twins, Young Children, Genetics, Cognitive Development