library(lcsm)
#> This is lcsm 0.3.2
#> Please report any issues or ideas at:
#> https://github.com/milanwiedemann/lcsm/issues
#>
Depending on the specified model, the following parameters can be estimated for univariate LCSMs:
Parameter | Description |
---|---|
gamma_lx1 | Mean of latent true scores x (Intercept) |
sigma2_lx1 | Variance of latent true scores x |
sigma2_ux | Variance of observed scores x |
alpha_g2 | Mean of change factor (g2) |
alpha_g3 | Mean of change factor (g3) |
sigma2_g2 | Variance of change factor (g2) |
sigma2_g3 | Variance of change factor (g3) |
sigma_g2lx1 | Covariance of change factor (g2) with the initial true score x |
sigma_g3lx1 | Covariance of change factor (g3) with the initial true score x |
sigma_g2g3 | Covariance of change factors within construct x |
beta_x | Proportional change x |
phi_x | Autoregression of change scores x |
For bivariate LCSMs, estimated parameters can be categorised into (1) Construct X, (2) Construct Y, and (3) Coupling between X and Y.
Parameter | Description |
---|---|
Construct X | |
gamma_lx1 | Mean of latent true scores x (Intercept) |
sigma2_lx1 | Variance of latent true scores x |
sigma2_ux | Variance of observed scores x |
alpha_g2 | Mean of change factor (g2) |
alpha_g3 | Mean of change factor (g3) |
sigma2_g2 | Variance of change factor (g2) |
sigma2_g3 | Variance of change factor (g3) |
beta_x | Proportional change x |
sigma_g2lx1 | Covariance of change factor (g2) with the initial true score x (lx1) |
sigma_g3lx1 | Covariance of change factor (g3) with the initial true score x (lx1) |
sigma_g2g3 | Covariance of change factors within construct x |
phi_x | Autoregression of change scores x |
Construct Y | |
gamma_ly1 | Mean of latent true scores y (Intercept) |
sigma2_ly1 | Variance of latent true scores y |
sigma2_uy | Variance of observed scores y |
alpha_j2 | Mean of change factor (j2) |
alpha_j3 | Mean of change factor (j3) |
sigma2_j2 | Variance of change factor (j2) |
sigma2_j3 | Variance of change factor (j3) |
beta_y | Proportional change y |
sigma_j2ly1 | Covariance of change factor (j2) with the initial true score y (ly1) |
sigma_j3ly1 | Covariance of change factor (j3) with the initial true score y (ly1) |
sigma_j2j3 | Covariance of change factors within construct y |
phi_y | Autoregression of change scores y |
Coupeling X & Y | |
sigma_su | Covariance of residuals x and y |
sigma_ly1lx1 | Covariance of intercepts x and y |
sigma_g2ly1 | Covariance of change factor x (g2) with the initial true score y (ly1) |
sigma_g3ly1 | Covariance of change factor x (g3) with the initial true score y (ly1) |
sigma_j2lx1 | Covariance of change factor y (j2) with the initial true score x (lx1) |
sigma_j3lx1 | Covariance of change factor y (j3) with the initial true score x (lx1) |
sigma_j2g2 | Covariance of change factors y (j2) and x (g2) |
sigma_j2g3 | Covariance of change factors y (j2) and x (g3) |
sigma_j3g2 | Covariance of change factors y (j3) and x (g2) |
delta_con_xy | Change score x (t) determined by true score y (t) |
delta_con_yx | Change score y (t) determined by true score x (t) |
delta_lag_xy | Change score x (t) determined by true score y (t-1) |
delta_lag_yx | Change score y (t) determined by true score x (t-1) |
xi_con_xy | Change score x (t) determined by change score y (t) |
xi_con_yx | Change score y (t) determined by change score x (t) |
xi_lag_xy | Change score x (t) determined by change score y (t-1) |
xi_lag_yx | Change score y (t) determined by change score x (t-1) |