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. Author manuscript; available in PMC: 2011 Jan 12.
Published in final edited form as: Sci Stud Read. 2007 Feb 1;20(1-2):51–75. doi: 10.1007/s11145-006-9018-x

Table 3.

Genetic and environmental influences on preschool vocabulary and print knowledge.

A1 A2 a2
Vocabulary Latent Trait .50* .25 (.12–.38)
Print Latent Trait .31* .40* .26 (.16–.36)
C1 C2 c2
Vocabulary Latent Trait .85* .72 (.58–.84)
Print Latent Trait .49* .67* .70 (.60–.78)
E1 E2 e2
Vocabulary Latent Trait .20* .04 (.01–.08)
Print Latent Trait .22* .00 .05 (.03–.08)

Note. 95% confidence intervals in parentheses.

*

Significantly greater than zero. N (pairs) = 997.