**ACE model**- 1 | 1 | 4 | 4 | 1 | 1 | 1
**ACE@ model**- 6
**additive genetic****covariance@ matrix**- 1
**deviations**- 1
**value**- 1
**variance**- 2 | 2

**additive@ genetic****variance**- 6

**ADE model**- 1 | 6 | 1 | 1
**AE model**- 6 | 4 | 1
**AE@ model**- 1
**age effects**- 4
**age-correction**- 4
**age-correction model**- 4
**AIC***see*Akaike Information

Criterion**Akaike Information**

@ Criterion- 2
**Akaike Information**

Criterion- 2
**alcohol**- 3
**allele**- 1
**American Association of Retired**

Persons twin@ registries- 4
**ascertainment**- 5
**assortative mating**- 3 | 1 | 4
**asymptotically distribution free****methods**- 5

**atopic symptoms**- 5
**Australian@ NH&MRC twin register**- 2
**basic genetic model**- 1
**BETA matrix**- 1
**between-family environment***see*

shared environment**binary data***see*ordinal data**biometric factors model***see*@

independent pathway model**biometric model**- 2
**biometrical genetical approach**- 3 | 5
**biometrical genetics**- 4 | 3
**biserial correlation**- 4
**bivariate genetic model**- 4
**bivariate normal distribution**- 2
**BMI***see*body mass index**body mass index**- 2 | 4
**Boker, Steven M**- 4 | 2
**Boomsma, Dorret I**- 5
**breeding experiments**- 2
**broad heritability**- 1
**Browne, Michael W**- 5
**Cardon, Lon R**- 2
**Carey, Gregory**- 2 | 1 | 2
**Carey,@ Gregory**- 1
**Cattell, Raymond**- 1
**causal closure**- 3
**Cavalli-Sforza, Luigi**- 2 | 4
**CBC***see*Child Behavior Checklist**CE model**- 6 | 6
**CE@ model**- 1
**centrality parameter**- 4
**Child Behavior Checklist**- 5
**cholesky decomposition**- 2 | 3
**cholesky factorization**- 2
**classical twin study**- 6 | 4
**classical twin@ study**- 1
**Cloninger, Robert C**- 4 | 5
**coefficient****correlation**- 1 | 2
**path**- 1 | 2
**regression**- 1

**common effects**

sex-limitation model- 1
**common effects G E**

interaction model- 2
**common environment***see*

shared environment**common pathway model**- 2 | 2
**competition effects**- 2 | 2
**competition@ effects**- 3
**contingency table**- 2
**contingency@ table**- 3
**continuous data**- 1 | 2 | 2
**contrast effects***see*

competition effects**cooperation effects**- 2 | 3 | 2
**correlated variable****assortment**- 1
**transmission**- 2

**correlation**- 2
**coefficient**- 1
**biserial**- 4
**polychoric**- 4
**polyserial**- 4
**product moment**- 4
**tetrachoric**- 4

**covariance**- 1
| 2
**structure**- 1
**structure analysis**- 2

**covariance matrix****expected**- 4
**observed**- 4

**covariation**- 1 | 4 | 1
**cross-lagged panel design**- 2
**data matrix**- 2
**degrees of freedom**- 2 | 1
**Delusions-Symptoms States@**

Inventory- 2
**dependent variables**- 3
**dependent@ variables**- 2
**depression**- 2
**developmental change and continuity**- 3
**deviation phenotypes**- 7 | 2
**direction of causation**- 2
**disturbance terms***see*

error variances**dizygotic twins**- 2
| 6
**reared apart**- 2
**reared together**- 6

**dizygotic@ twins****reared apart**- 6
**reared together**- 1 | 2

**dominance**- 1
**deviations**- 1 | 1
**variance**- 2 | 2 | 6

**double-headed arrow**- 2
**DZ***see*dizygotic twins**E model**- 6 | 1
**Eaves, Lindon**- 1 | 1 | 2 | 2 | 2 | 2 | 3 | 4 | 5 | 8 | 9 | 1 | 1 | 1 | 1 | 4 | 3
**endogenous@ variables***see*

dependent variables**environmental correlation**- 1
**environmental effects****between families**- 2
**within families**- 2

**environmental exposure**- 3
**concordant for exposure**- 3
**concordant@ for non-exposure**- 3

**environmental@ exposure****discordant for exposure**- 3

**epidemiological approach**- 3
**epistasis**- 1 | 4 | 6
**equal environments assumption**- 1
**equality of means**- 7
**error variances**- 2
**exogenous variable***see*@

independent variables**expected covariance**- 4 | 1 | 2
**expected twin covariances**- 1
| 1
**equal gene frequencies**- 1
**numerical illustration**- 2
**unequal gene frequencies**- 2

**expected twin@ covariances**- 6
**expected variance**- 4 | 1 | 2
**expected@ covariance**- 1
**factor analysis**- 5
**correlations**- 2
**error variances**- 2
**loadings**- 2 | 2
**pattern**- 1
**scores**- 2

**factor-analytic approach**- 5
**factor@ analysis****structure**- 1

**Falconer, D S**- 1 | 1 | 1 | 2
**family environment***see*

shared environment**feedback loop**- 5
**feedback@ loop**- 2
**Feldman, Marcus**- 4
**Feldman,@ Marcus**- 2
**Fisher, Ronald**- 1 | 3
**Fisher, Ronald A**- 3 | 3 | 3 | 3 | 3 | 3 | 3 | 4 | 4 | 4 | 4 | 4 | 5 | 1 | 1 | 1 | 2 | 2 | 4
**FORTRAN format**- 3
**Fulker, David W**- 3 | 5 | 5 | 5 | 5 | 4 | 2 | 5 | 5 | 2
**Galton, Francis**- 2
**gamete**- 2
**gametic crosses**- 2
**gene**- 1
**gene frequencies**- 2 | 2
**general G E interaction model**- 1
**general sex-limitation@ model**- 1
**genetic cholesky model**- 2
**genetic correlation**- 1
**genetic effects****additive**- 1
**non-additive**- 1

**genetic environment**- 2
**genetic factor model****multiple**- 4
**environmental correlations**- 1
**genetic correlations**- 1

**simple**- 3
**second common factor**- 4
**single common factor**- 3

**genotype**- 1
**genotype environment interaction**- 1
**genotype environment interaction model**- 3
**genotype environment interaction model****general**- 1

**genotype environment interaction model****common effects**- 2

**genotype environment interaction model****scalar effects**- 3

**genotype environment@ interaction**- 3
**genotype environment interaction**- 3
**genotype environment interaction****scalar**- 3

**genotype environment interaction****non-scalar**- 3

**genotype environment@ interaction**- 1
**genotype @ age-cohort**

interaction- 2
**genotype-environment****autocorrelation**- 2
**correlation**- 3 | 2 | 1
**covariance**- 3

**genotype-environment effects****assortative mating**- 1
**correlated variable****assortment**- 1
**transmission**- 2

**G E interaction**- 3
**genotype-environment****autocorrelation**- 2
**correlation**- 2

**latent variable assortment**- 1
**phenotypic assortment**- 1
**sibling effects**- 2
**social homogamy**- 1
**stabilizing selection**- 2

**genotypic****effects**- 1 | 2
**mean**- 2 | 2
**variance**- 2 | 2

**frequencies**- 2 | 2
**values**- 1 | 2

**Heath, Andrew C**- 1 | 1 | 1 | 2 | 5 | 1 | 1 | 1 | 1 | 1 | 2 | 3 | 3
**heritability****broad**- 6
**narrow**- 6

**heterogeneity****of means**- 7
**of variances**- 8
**of@ means**- 8

**heteroscedasticity**- 2
**heterozygote**- 1 | 1
**Hewitt, John K**- 4 | 1 | 5 | 5 | 5
**homozygote**- 1 | 1
**hypothesis testing**- 5
**identification**- 7
**combined parameters**- 7
**model**- 7
**numerical approach**- 7
**parameter**- 7

**imitation effects***see*

cooperation effects**IMSL**- 2
**inbreeding**- 1
**independent pathway model**- 1
**independent variables**- 3
**independent@ variables**- 2
**Jinks, John L**- 3 | 1 | 2 | 3 | 3 | 4 | 5 | 1 | 1 | 2 | 6 | 5 | 1 | 2
**Jinks, John@ L**- 1
**Jöreskog, Karl G**- 5 | 5 | 5 | 5
**Kendler, Kenneth S**- 2 | 1 | 3 | 3 | 1 | 1 | 1 | 1 | 2
**latent variable assortment**- 1
**latent variables**- 2 | 6
**law of independent assortment**- 2
**law of segregation**- 2
**liability***see*multivariate normal,

liability distribution**likelihood**- 5
**likelihood ratio test**- 6 | 4
**linear regression**- 5
**direct effect**- 5
**indirect@ effects**- 5

**linear structural model**- 1
**linear structural@ model**- 1
**linear@ regression****cause**- 5
**common cause**- 5

**linearity**- 3
**linkage analysis**- 1
**LISCOMP**- 5
**LISREL**- 5
**locus**- 1
**major depressive disorder**- 1
**manifest@ variables***see*

observed variables**marital status**- 2
**Martin, Nicholas G**- 5 | 5 | 2 | 5 | 4 | 4 | 4 | 1 | 1 | 3 | 3
**Martin,@ Nicholas G**- 5
**Mather, Kenneth**- 3 | 1 | 3 | 4 | 1 | 1 | 1 | 2 | 1 | 2
**Mather,@ Kenneth**- 6
**matrix****addition**- 1
**cofactor**- 2
**correlation**- 1
**covariance**- 1
**data**- 2 | 1
**definiteness****negative**- 2
**positive**- 2

**determinant**- 2
**diagonal**- 2
**dimensions**- 2
**identity**- 2
**inner product**- 2
**inverse**- 4 | 7
**multiplication**- 2
**null**- 2
**order**- 2
**scalar**- 2
**singular**- 2
**square**- 2
**subtraction**- 1
**trace**- 3
**transformation**- 2
**transpose**- 1
**unit**- 2
**vector**- 2

**matrix algebra**- 4
**applications**- 5
**equations**- 4
**operations**- 3
**binary**- 1
**unary**- 2

**Maximum Likelihood**- 5
**McArdle, J Jack**- 5 | 2 | 1 | 2 | 2
**McArdle, J@ Jack**- 4
**mean**- 4 | 1
**mean squares**- 2
**measured variables***see*@

observed variables**measurement error**- 1
**measurement@ error**- 8
**Medical College of Virginia**

Twin Study- 3
**Mendel, Gregor**- 2 | 2
**Mendelian@ genetics**- 1
**model building**- 3
**model fitting**- 3
**Molenaar, Peter C**- 5
**monozygotic twins**- 2
| 6
**reared apart**- 6
**reared together**- 6
**reared@ together**- 1

**monozygotic@ twins****reared apart**- 2
**reared together**- 2

**Morton, Newton E**- 4 | 5
**multiple genetic factor model**- 4
**multiple indicators**- 1
**multiple rating data**- 1
**multiple@ indicators**- 8
**multivariate genetic analysis**- 5 | 10
**multivariate genetic factor model**- 1
**common pathway model**- 5
**genetic cholesky model**- 2
**independent pathway model**- 5

**multivariate genetic model**- 2 | 2 | 3
**multivariate normal****liability distribution****bivariate**- 2
**univariate**- 1

**Muthén,@ Bengt O**- 3 | 5
**Mx**- 2 | 3 | 5 | 5 | 5 | 2
**Mx output**- 4
**goodness-of-fit@ statistics**- 4
**parameter estimates**- 4
**parameter specifications**- 4
**standardized parameter estimates**- 4

**Mx script**- 3
**algebra section**- 3
**calculation group**- 3
**data section**- 3
**matrices declaration**- 3
**model specification**- 3
**title**- 3

**mx scripts****options**- 3

**MZ***see*monozygotic twins**NAG**- 2
**Nance, Walter E**- 2
**Neale, Michael C**- 5 | 1 | 3 | 3 | 4 | 8 | 9 | 3 | 1 | 1 | 4 | 1 | 5 | 5 | 2 | 2 | 2 | 1 | 6
**Neale,@ Michael C**- 2
**non-central chi-squared@ distribution**- 4
**non-scalar****G E interaction**- 3
**sex-limitation**- 1

**normal distribution assumption**- 3
**observed statistics**- 2
**observed variables**- 2
**observer ratings**- 11
**paternal**- 1

**observer@ ratings****maternal**- 1

**one-way arrow***see*@

single-headed arrow**ordinal data**- 1
| 3
**liability**- 1
**thresholds**- 1

**parameter estimation**- 5
**parameters**- 2
**parsimony**- 1
**path analysis**- 4
| 1
**assumptions**- 3
**causal closure**- 3

**conventions**- 2
**tracing rules**- 4
**standardized variables**- 1 | 1
**unstandardized variables**- 2 | 2

**path coefficients model**- 1 | 1 | 3
**path coeffients**- 2
**path diagram**- 1
| 4
| 5
| 6
**dependent variables**- 2
**independent variables**- 2
**latent variables**- 2
**observed@ variables**- 2
**paths**- 2
**causal**- 1
**correlational**- 1

**single-headed@ arrow**- 2

**path-analytic approach**- 5
**path@ analysis****assumptions****linearity**- 3
**unitary variables**- 3

**path@ coefficients model**- 6
**path@ diagram****double-headed arrow**- 2

**Pearson, Karl**- 3
**Pearson,@ Karl**- 2
**phenotype**- 1
**phenotypic factor model**- 2
**confirmatory factor model**- 1
**exploratory factor model**- 1

**pleiotropy**- 1 | 1 | 1
**polychoric correlation**- 4 | 5
**polygenic model**- 3
**polygenic system**- 1
**polyserial correlation**- 4 | 5
**power**- 7
**contributing factors**- 2

**power analysis**- 3
**continuous data**- 4
**ordinal data**- 5

**power calculation**- 3
**PRELIS**- 1 | 3 | 5 | 5
**primary phenotypic assortment**- 1
**product moment correlation**- 4
**psychometric factors model***see*

common pathway model**psychometric model**- 2
**Punnett square**- 2
**Punnett, Reginald**- 2
**quantitative genetics**- 3
**RAMPATH**- 4
**random environment**- 2
**random environmental****variance**- 6

**random mating**- 2 | 1
**random@ environmental****covariance matrix**- 1
**deviations**- 1

**Rao, D C**- 1
**Rao, DC**- 5
**rater bias**- 2
**parental**- 2

**rater bias model**- 1
**rating data model****biometric**- 3
**psychometric**- 2
**rater bias**- 1

**raw data**- 1
**recursive model**- 1 | 1
**regression models**- 5
**Reich, Ted**- 4
**residual variables**- 2
**Rice, John**- 4
**sample size**- 7
**SAS**- 1 | 1 | 2
**scalar****G E interaction**- 3
**sex-limitation**- 1

**scalar effects**

sex-limitation model- 2
**scalar effects G E**

interaction model- 3
**segregation@ analysis**- 1
**sex-limitation**- 1
| 1
**non-scalar**- 1
**scalar**- 1

**sex-limitation model**- 2
**common effects**- 1
**general**- 1
**scalar effects**- 2

**shared environment**- 2
**shared environmental****deviations**- 1

**shared@ environmental****variance**- 6

**sibling effects**- 2
**competition**- 2 | 3
**cooperation**- 2

**sibling interaction**- 1
**sibling interaction model**- 3
**sibling shared environment**- 2
**sibling@ effects****competition**- 2
**cooperation**- 3 | 2

**sibling@ interaction**- 1
**significance test**- 6 | 2
**significance@ test**- 3
**simple genetic factor model**- 3
**simple genetic model**- 6
**single-headed arrow**- 2
**singleton twins**- 8
**singleton@ twins****concordant-participant pairs**- 8
**discordant-participant twins**- 8

**skinfold measures**- 3
**social homogamy**- 1
**social interaction**- 1 | 1
**Sörbom, Dag**- 5 | 5
**Spearman, Charles**- 1 | 3
**special MZ twin environment**- 2
**special twin environment**- 2
**specific environment***see*

random environment**specific variances***see*@

error variances**SPSS**- 1
**stabilizing selection**- 2
**standard deviation**- 1
**standardized variables**- 1
**structural equations**- 1
**sufficient statistic**- 1
**summary statistics**- 1
**correlation coefficient**- 1
**covariance**- 1
**mean**- 1
**mean squares**- 2
**standard deviation**- 1
**variance**- 1
**weight matrix**- 5

**tetrachoric correlation**- 4 | 5
**threshold**- 1
**Thurstone, LL**- 5
**tracing rules**- 4
**transformation**- 2
**triangular decomposition***see*

cholesky decomposition**twin design**- 1 | 6 | 1
**twin pairs****dizygotic**- 2 | 2
**like-sex**- 1
**opposite-sex**- 2 | 1 | 1

**female**- 1
**male**- 1
**monozygotic**- 2 | 2
**like-sex**- 1

**twin@ design**- 1
**two-way arrow***see*

double-headed@ arrow**type II error**- 3
**ultimate@ variables***see*

independent variables**unique environment***see*

random environment**unique variances***see*

error variances**unitary variables**- 3
**univariate genetic analysis**- 6
**univariate genetic@ model**- 1
**univariate normal distribution**- 1
**unmeasured@ variables***see*

latent variables**unreliability**- 2 | 1
**unstandardized variables**- 2
**variables****continuous**- 4
**dichotomous**- 4
**polychotomous**- 4
**standardized**- 1
**unstandardized**- 2

**variance**- 1 | 2
**variance components model**- 6 | 2 | 5
**variance components@ model**- 1
**variation**- 2 | 1 | 6 | 4 | 1
**vertical cultural transmission***see*

cultural transmission**Vogler, G.P**- 1
**weight matrix**- 5
**within-family environment***see*

random environment**Wright, Sewall**- 3 | 3 | 3 | 3 | 3 | 4 | 4 | 4 | 1 | 3 | 3 | 4 | 1 | 1
**Yee, S**- 5
**zygosity diagnosis**- 1

Jeff Lessem 2002-03-21