THE MINNESOTA TWIN REGISTRY

我们建议确定约9500对中约80%的位置 1936年至1955年在明尼苏达州出生的同性双胞胎。这对双胞胎会 被要求提供传记(包括医疗)以及 个性和兴趣测试数据，使用三个连续的水平 加大了激励力度。第一个目标是建立一个巨大的双胞胎 未来可能对我们自己和他人有用的家庭登记 精神病学和生物医学研究。第二个目标是测试 容易招募的异卵双胞胎更相似的假说 在许多维度上的内部配对比不易招募的DZ双胞胎 因此，已发表的DZ关联式高估了真实的相似性 通常是DZ双胞胎。同样的数据将从配偶和第一个 参赛双胞胎的学位亲属。第三个目标是 复制和推广以前的发现，在这些特征中，MZ 相关性很高，而DZ(和其他一阶)相关性很低 或者是零。第四个目标是进行大规模的生物识别分析 这些双胞胎家庭的数据。第五个目标是为 选择真正具有代表性的100 MZ和100 DZ对样本 每个双胞胎都有一个配偶和至少一个年轻的成年后代可供 来我们大学的实验室参加两天的能力测试和 心理生理测试。

We propose to locate some 80 percent of the approximately 9,500 pairs of same-sex twins born in Minnesota from 1936 through 1955. These twins will be solicited to provide biographical (including medical) as well as personality and interest test data, using three successive levels of increased incentive. The first objective is to establish a large twin family registry that could be useful to ourselves and others in future psychiatric and biomedical research. The second objective is to test the hypothesis that easily recruited dizygotic twins are more similar within-pairs on many dimensions than are less easily recruited DZ twins and, hence, that published DZ correlations overestimate the true similarity of DZ twins generally. The same data will be obtained from spouses and 1st degree relatives of participating twins. The third objective is to replicate and extend previous findings of "emergenic" traits in which MZ correlations are high while DZ (and other 1st degree) correlations are low or zero. A fourth objective is to perform large-scale biometrical analyses on these twin-family data. A fifth objective is to provide a basis for selecting a truly representative sample of 100 MZ and 100 DZ pairs in which each twin has a spouse and at least one young-adult offspring available to come to our University laboratories for 2 days of aptitude and psychophysiological testing.