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Seventeenth International Workshop On Methodology of Twin And Family Studies. Boulder, CO, 2004. Netherlands Twin Register (NTR). 30,000 twin pairs registered at birth, born after 1986. Questionnaire variables Zygosity, health and growth2, 3, 5, 7, 10, 12, (14, 16) - PowerPoint PPT Presentation
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Netherlands Twin Register (NTR)
30,000 twin pairs registered at birth, born after 1986
Questionnaire variablesZygosity, health and growth 2, 3, 5, 7, 10, 12, (14, 16)SES 3, 7, 10, 12Problem behavior
CBCL (Devereux at 5) 3, 5, 7, 10, 12TRF 7, 10, 12YSR 12, (14,
16)Motor development 2, 5School achievement 5, 12, (14, 16) Family Composition 5, 12, (14, 16)
Seventeenth International Workshop On Methodology of Twin And Family Studies Boulder, CO, 2004
Aggressive and Rule-Breaking Behavior
Seventeenth International Workshop On Methodology of Twin And Family Studies Boulder, CO, 2004
Seventeenth International Workshop On Methodology of Twin And Family Studies Boulder, CO, 2004
AGGM10
37.5
35.0
32.5
30.0
27.5
25.0
22.5
20.0
17.5
15.0
12.5
10.0
7.5
5.0
2.5
0.0
HistogramF
req
ue
ncy
1600
1400
1200
1000
800
600
400
200
0
Std. Dev = 5.48
Mean = 5.9
N = 5870.00
Aggressive Behavior 10 year old twins
rated by their mother
skewness: 1.346
Seventeenth International Workshop On Methodology of Twin And Family Studies Boulder, CO, 2004
TAGGM10
6.005.50
5.004.50
4.003.50
3.002.50
2.001.50
1.00.50
0.00
HistogramF
req
ue
ncy
800
600
400
200
0
Std. Dev = 1.21
Mean = 2.10
N = 5870.00
Square root transformed Aggressive Behavior 10 year old twins rated by their mother
skewness: .046
Seventeenth International Workshop On Methodology of Twin And Family Studies Boulder, CO, 2004
SPSS descriptives
Pairs Ma Mb Vara Varb r
MZM 514 2.41 2.38 1.62 1.56 .84
DZM 467 2.24 2.31 1.62 1.50 .50
MZF 609 1.98 1.90 1.31 1.28 .79
DZF 452 1.95 1.91 1.36 1.26 .54
DOSm-f 885 2.23 1.81 1.57 1.29 .47
Seventeenth International Workshop On Methodology of Twin And Family Studies Boulder, CO, 2004
Mx Means and Variance (Saturated)Males -2LL df par Δχ2 df p AIC
means free 5712.15 195610
eq means 5716.90 1959 7 4.755 3 .191 -1.245
eq m/ eq v 5718.77 1962 4 6.622 6 .357 -5.378Females -2LL df par Δχ2 df pAIC
means free 5844.97 2120 10
eq means 5854.08 2123 7 9.110 3 .0283.11
eq m/ eq v 5855.33 2126 4 10.360 6 0.110 -1.64
eq v 5846.23 2123 7 1.257 3 0.139 -4.74
Males/Females -2LL df par Δχ2 df p AIC
means free 11557.121 4076 20
eq means 11636.350 4083 13 79.229 7 .00065.229
eq m/ eq v 11652.008 4090 6 94.887 14 .00066.887
eq v 11572.401 4083 13 15.280 7 .0331.280
Seventeenth International Workshop On Methodology of Twin And Family Studies Boulder, CO, 2004
Mx Estimates of Means and Variances
T1 T2 VT1 VT2 r r (eq m)
MZF 1.99 1.90 1.31 1.28 .792 .789
DZF 1.95 1.91 1.36 1.26 .538 .537
MZM 2.41 2.38 1.61 1.56 .83
DZM 2.24 2.30 1.61 1.49 .50
Seventeenth International Workshop On Methodology of Twin And Family Studies Boulder, CO, 2004
Mx Means and Variance (Saturated)
SS and OS twins
Males/Females -2LL df par Δχ2 df p AIC
16997.749 5845 25
eq m ssm 17002.503 5848 22 4.755 3 .191 -1.245
ss/os 17005.925 5849 21 8.176 4 .085 0.176
eq m ssf 17006.859 5848 22 9.110 3 .0283.110
ss / osf 17012.611 5849 21 14.862 4 .0056.862
Seventeenth International Workshop On Methodology of Twin And Family Studies Boulder, CO, 2004
Model Fitting Results
Boys
-2LL df χ2 Δdf A C E
ACE 5713.827 1959 .67 .17 .16
AE 5719.542 1960 5.72 1 .84 - .16
CE 5864.235 1960 150.4 1 - .68 .32
Girls
-2LL df χ2 Δdf A C E
ACE 5846.232 2123 .52 .28 .21
AE 5861.720 2124 15.49 1 .80 - .20
CE 5936.009 2124 89.77 1 - .68 .32
