Table 4.
Parameter estimates of LCS Model 4
| Ctx = Cortical Thickness | Ctx = Cortical Surface Area | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Parameter | Estimate | SE | p | Stzd. factor loading / Correlation | Estimate | SE | p | Stzd. factor loading / Correlation | ||
| Factor | λ Block Designc | 1.000 | fixed | .781b | 1.000 | fixed | .783b | |||
| loadingsa | λ Matricesb | .685 | .042 | .000 | .713b | .685 | .042 | .000 | .715b | |
| (g measured by) | λ Similarities | .945 | .028 | .000 | .892b | .945 | .028 | .000 | .893b | |
| λ Vocabulary | 1.014 | .028 | .000 | .924b | 1.014 | .028 | .000 | .925b | ||
| Intercepts | τ g0 | .000 | fixed | .000 | fixed | |||||
| τ gs | .742 | .029 | .000 | .752 | .026 | .000 | ||||
| τ Ctx0 | .759 | .078 | .000 | .138 | .092 | .132 | ||||
| τ CtxS | −.052 | .078 | .505 | .209 | .046 | .000 | ||||
| Regressions | δ Age → g0 | .145 | .013 | .000 | .572 | .147 | .013 | .000 | .582 | |
| δ ln(Age) → g0 | .304 | .041 | .000 | .370 | .296 | .041 | .000 | .360 | ||
| δ Age → Ctx0 | −.170 | .027 | .000 | −.694 | −.072 | .032 | .026 | −.260 | ||
| δ ln(Age) → Ctx0 | .084 | .093 | .367 | .106 | .238 | .110 | .031 | .264 | ||
| δ Age → gs | −.057 | .009 | .000 | −.938 | −.062 | .010 | .000 | −1.060 | ||
| δ ln(Age) → gs | −.014 | .023 | .554 | −.069 | .013 | .027 | .625 | .068 | ||
| δ Age → CtxS | .028 | .025 | .262 | 1.230 | −.003 | .010 | .787 | −.083 | ||
| δ ln(Age) → Ctxs | −.143 | .068 | .034 | −1.916 | −.100 | .045 | .025 | −.926 | ||
| Determinants | β g → Δg | .051 | .033 | .129 | .037 | .039 | .352 | |||
| of change in g | ϕ Δg → Δg | −.208 | .065 | .001 | −.526 | .130 | .000 | |||
| γ Ctx → Δg | .003 | .017 | .836 | .014 | .013 | .293 | ||||
| ξ ΔCtx → Δg | .330 | .119 | .005 | 1.016 | .471 | .031 | ||||
| Determinants | β Ctx → ΔCtx | .000 | .047 | .997 | −.014 | .014 | .334 | |||
| of change in Ctx | ϕ ΔCtx → ΔCtx | −.880 | .221 | .000 | −.260 | .586 | .658 | |||
| γ g → ΔCtx | −.127 | .094 | .173 | .014 | .043 | .741 | ||||
| ξ Δg → ΔCtx | −.331 | .139 | .017 | −.199 | .154 | .197 | ||||
| Latent residual | σ g0-Ctx0 | .044 | .018 | .015 | .173 | .075 | .022 | .001 | .211 | |
| variances-covar. | σ2 g0 | .131 | .013 | .000 | .160 | .131 | .014 | .000 | .160 | |
| σ2 Ctx0 | .490 | .051 | .000 | .638 | .971 | .077 | .000 | .985 | ||
Note: n=430. Statistically significant parameters of interest are shaded (α=.05).
“a”
= factor loadings invariant across occasions (except for Matrices).
“b”
= mean across the three waves.
“c”
= parameter fixed.
“ln(Age)” = Natural logarithm of age, capturing non-linear influences. Intercepts for the observed indicators and residual variances are not shown. Standardized values for the intercepts and dynamic parameters are not interpretable, and therefore not shown.