Symbol in Symbol in Description Article Mplus Scripts Variables Y Y observed outcome (e.g. reasoning test performance) inferred "true score" in the comparison condition (e.g. the score that the Fc subject would receive if he/she took the reasoning test in the sugar pill Fc condition, naïve to previous measurement or treatment) inferred causal effect = theoretical true score in manipulation condition - theoretical true score in the comparison condition (e.g. reasoning F Fd performance in medication condition - reasoning performance in sugar pill condition) inferred net effect of extraneous variables (e.g. history, maturation, FT Ft reactivity, measurement error). T stands for Threat to internal validity. a measured covariate (e.g. age) x Parameters mFc mean of the inferred "true in the comparison condition Fc mFd mean of the inferred causal effect F mean net effect of extraneous variables mFt FT between-person variance of the inferred "true score" in the comparison 2Fc s2Fc condition s2Fd between-person variance of the inferred causal effect 2F between-person variance of the net effect of extraneous variables s2Ft 2FT covariance between individual differences in true comparison condition scd c performance and individual differences in the causal effect covariance between individual differences in true comparison condition sct performance and individual differences in the net effect of extraneous c variables covariance between individual differences in the causal effect and sdt  individual differences in the net effect of extraneous variables covariance between a measured covariate and individual differences in sxc x,c true comparison condition performance covariance between a measured covariate and individual differences in sxd  x, the causal effect covariance between a measured covariate and individual differences in sxt  x, the net effect of extraneous variables
Symbol in Article Symbol in Mplus Scripts Description Variables Y Y observed outcome (e.g. reasoning test performance) Fc Fc inferred "true score" in the comparison condition (e.g. the score that the subject would receive if he/she took the reasoning test in the sugar pill condition, naïve to previous measurement or treatment) F Fd inferred causal effect = theoretical true score in manipulation condition - theoretical true score in the comparison condition (e.g. reasoning performance in medication condition - reasoning performance in sugar pill condition) FT Ft inferred net effect of extraneous variables (e.g. history, maturation, reactivity, measurement error). T stands for Threat to internal validity. x a measured covariate (e.g. age) Parameters Fc mFc mean of the inferred "true in the comparison condition F mFd mean of the inferred causal effect FT mFt mean net effect of extraneous variables 2Fc s2Fc between-person variance of the inferred "true score" in the comparison condition 2F s2Fd between-person variance of the inferred causal effect 2FT s2Ft between-person variance of the net effect of extraneous variables c scd covariance between individual differences in true comparison condition performance and individual differences in the causal effect c sct covariance between individual differences in true comparison condition performance and individual differences in the net effect of extraneous variables  sdt covariance between individual differences in the causal effect and individual differences in the net effect of extraneous variables x,c sxc covariance between a measured covariate and individual differences in true comparison condition performance  x, sxd covariance between a measured covariate and individual differences in the causal effect  x, sxt covariance between a measured covariate and individual differences in the net effect of extraneous variables
MET-Tucker-Drob20080127-RRR-S1.docx