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. Author manuscript; available in PMC: 2019 Nov 1.
Published in final edited form as: Child Dev. 2017 Jun 1;89(6):e480–e493. doi: 10.1111/cdev.12853

Table 2.

Univariate Estimates for Heritability (h2), Shared Environmental (c2) and Non-shared Environmental (e2) Influences for All Measures [with 95% Confidence Intervals].

Measured Variables Grade h2 c2 e2
LNF K .44* [.19–.70] .23* [.08–.44] .33* [.27–.42]
PSF K .44* [.15–.67] .11 [.00–.32] .45* [.37–.57]
NWF 1 .47* [.24–.70] .15 [.00–.34] .38* [.31–.46]
ORF 1 .50* [.37–.73] .22* [.15–.33] .28* [.18–.30]
FCAT 7 .46* [.31–.63] .31* [.16–.46] .23* [.19–.27]

Note.

*

indicates significance based on confidence intervals not bounding zero.

LNF = letter naming fluency, PSF = phoneme segmentation fluency, NWF = nonsense word fluency, ORF = oral reading fluency, FCAT = Florida Comprehensive Assessment Test - reading comprehension, K = kindergarten.