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. 2015 Jan 20;10(1):e0113807. doi: 10.1371/journal.pone.0113807

Figure 1. Quantitative genetic simplex model of Reading Comprehension from Grades 1–6.

Figure 1

Continuous transmitted and age-specific novel effects are decomposed into genetic (A), shared environmental (C), and nonshared environmental (E) sources. Continuous transmitted effects are quantified by paths from one time point to the next (e.g., the path from A1 → A2 (.84) quantifies the genetic effects transmitted from Reading Comprehension in Grade 1 to Reading Comprehension in Grade 2). Age-specific novel effects are quantified by the disturbances on each latent etiological variable (e.g., the .35 disturbance path onto A2 is the age-specific genetic effect for Reading Comprehension in Grade 2). *p <.05.