Figure 2.

Sample univariate dual change score model. η_0y = latent intercept, η_1y = latent slope, ψ₀ = latent intercept variance, ψ₁ = slope variance, ψ₀₁ = latent covariance, θ₀= latent intercept mean, θ₁ = latent slope mean, ε_1–4 = observed score residuals, ${\sigma }_{1-4}^2=\text{residual}\text{variances}$, α = mean constant change, β = auto-proportion coefficient, ω₁= change score variances, Δy_t = latent change scores, y1–y4 factor variances not included in figure.