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Perinatal factors and handedness in twins at six and one-half years Giles, Lucille Dorrean


The purpose of this study was to examine the relationship between perinatal factors and handedness in twins at six and one-half years. Longitudinal data concerning 66 twins from the U.B.C. Department of Pediatrics Premature's Growth and Development Survey were used to determine specific prenatal, postnatal and neurological indicators of non right-handedness. Analysis of the data indicated that four perinatal high risk factors were the maternal complications of toxemia, diabetes, age and medications. Discriminant functions on six perinatal high risk categories revealed that Mother's Perinatal Problems, Infant's Breathing Problems and Infant's Neurological Status were significantly related to non right-handedness. Both the limitations and implications of the findings were discussed.

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