. Author manuscript; available in PMC: 2014 Nov 1.

Published in final edited form as: Behav Genet. 2013 Sep 25;43(6):480–490. doi: 10.1007/s10519-013-9615-9

Table 1.

Twin correlations for measures of sensation seeking and lack of planning.

	Twin 2 phenotype				Twin 2 phenotype
	Monozygotic Women (659 pairs)				Monozygotic Men (461 pairs)
Twin 1 Phenotype	1	2	3	4	1	2	3	4
1) Lack of Planning Factor^a	.31				.40
2) MPQ Control Scale	.31	.34			.42	.45
3) Sensation Seeking Factor^a	.10	.13	.49		.22	.23	.51
4) ZSS Total	.22	.23	.43	.57	.26	.27	.42	.48
	Twin 2 phenotype				Twin 2 phenotype
	Dizygotic Women (529 pairs)				Dizygotic Men (403 pairs)
Twin 1 Phenotype
1) Lack of Planning Factor^a	.21				.17
2) MPQ Control Scale	.21	.21			.14	.13
3) Sensation Seeking Factor^a	.13	.12	.27		.09	.11	.33
4) ZSS Total	.20	.18	.24	.27	.10	.08	.28	.32

Note: MPQ=Multidimensional Personality Questionnaire (Tellegen, 1982); SSF=Sensation Seeking measure extracted from factor analyses in the current study; ZSS=Total Zuckerman Sensation Seeking Scale (Zuckerman et al., 1964). The lack of planning factor and MPQ Control scale were correlated .96. The SSF and ZSS were correlated .78. Also included in the analyses were data from 786 single twins: 190 MZ women, 166 MZ men, 197 DZ women, and 233 DZ men.