Left-Handedness in Twin Families: Support of an Environmental Hypothesis
Left-Handedness in Twin Families: Support of an Environmental Hypothesis
复制标题
双胞胎家庭中的左撇子：环境假说的支持
DOI：
10.2466/pms.1987.64.1.155
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发表时间：
1987
影响因子：
1.6
通讯作者：
K. Berg
中科院分区：
文献类型：
--
作者：
K. Tambs;P. Magnus;K. Berg
研究人员从197对MZ双胞胎和203对DZ双胞胎以及他们的父母、配偶和子女中收集了有关惯用手的信息，以书写方式进行评估。通过2 × 2表格，计算卡方值和四分频相关性来研究亲属对的相关性。的相关性。对母亲子女和兄弟姐妹的相关性为3，而对表兄弟姐妹的相关性为。25（小样本）。没有发现其他显著的关联，甚至对双胞胎也是如此。这些结果表明，如果有的话，遗传影响很小，家庭之间的环境影响也很小，其中大部分似乎是母亲的影响。双卵双胞胎相关性的缺乏以及其中一个双胞胎与其普通兄弟姐妹的相关性表明，存在一种特定于双胞胎的效应，因为普通兄弟姐妹之间的相关性是显著的。仅从双胞胎研究中得出的结论可能有偏差。在挪威上个世纪出生的不同年龄组中，左手写字的频率从1%增加到10%。这种年龄效应主要体现在手写上，而在惯用手的人身上并不多见，这表明对左手写字的文化压制有所减少。
Information on handedness, assessed as writing-hand, was collected from 197 MZ twin pairs and 203 DZ twin pairs and from their parents, spouses, and children. Associations for pairs of relatives were studied by 2 × 2 tables, computing chi squared-values and tetrachoric correlations. Correlations of about .3 were obtained for mother-offspring and sibling pairs, while for cousins the correlation was .25 (in a small sample). No other significant associations were found, not even for twins. These results suggest only a small, if any, genetic effect, and only a small environmental between family effect, most of which seems to be a maternal effect. The lack of cotwin correlations and correlations for one of the twins with her/his ordinary brothers/sisters suggest the existence of an effect specific to twins, since the correlation for pairs of ordinary siblings is significant. Conclusions drawn from twin studies alone may be biased. The frequency of left-hand writers has increased from 1% to 10% in the different age groups born during the last century in Norway This age effect is present mainly in hand writing and not so much in handedness generally, suggesting a decrease in cultural repression against left-hand writing.
影响因子：
56.9
作者：
BOUCHARD, TJ;MCGUE, M
通讯作者：
MCGUE, M