Table 2.

Table of analytic models and specifications for $\mathbf{G}$ and $\mathbf{R}$ matrices, along with the number of covariance parameters. A hyphen in the R matrix columns indicates that no R-matrix type was specified. For the parameters, numbers appearing to the left of the comma pertain to analytic models containing time × group random effects, while numbers to the right pertain to analytic models containing only group-intercept random effects. Values appearing in parentheses correspond to to the number of covariance parameters for the mean model. Note that Saturated analytic models did not fit time-invariant group random effects

	Cross-sectional			Cohort
Model	G Matrix	R Matrix	Parameters	G Matrix	R Matrix	Parameters
RM-ANOVA with VC	VC	-	3, 2	VC	CS	4, 3
RM-ANOVA with UN	UN	-	16 (15), 2	VC	UN	17, 16
RC	UN	-	4, 2	UN	-	7, 4
Saturated	UN	UN(1)	20 (15), -	UN	UN	30 (15), -