Alin Akerman B, Thomassen P A
Department of Special Education, School of Education, Karolinska Hospital, Stockholm, Sweden.
Acta Genet Med Gemellol (Roma). 1991;40(1):21-7. doi: 10.1017/s0001566000006693.
A group of 34 twin pairs was studied at four years of age. Characteristics of the group were a homogeneous social background, good parental interrelationship and conscientious care during pregnancy, delivery and the neonatal period. All the children were tested with the Griffiths' Mental Development Scales. The girls generally showed a higher development quotient than the boys. Birth weight seemed to be the most important factor; at 4 years of age, the twins with a birth weight of less than 2500 grams had a significantly lower locomotor quotient. The language quotient showed a similar trend. This difference was, however, not significant. No significant differences in either locomotor or language development could be observed between MZ and DZ twins.
对一组34对双胞胎在4岁时进行了研究。该组的特点是社会背景相同、父母关系良好且在孕期、分娩期及新生儿期得到悉心照料。所有儿童均接受了格里菲斯心理发展量表测试。女孩的发展商通常高于男孩。出生体重似乎是最重要的因素；在4岁时，出生体重低于2500克的双胞胎运动商显著较低。语言商也呈现出类似趋势。然而，这种差异并不显著。同卵双胞胎和异卵双胞胎在运动或语言发展方面均未观察到显著差异。
