D2 IDENTICAL OR FRATERNAL-PQ

Variable Description

Name
PD2
Label
D2 IDENTICAL OR FRATERNAL-PQ
Dataset
parent1

Summary Statistics for 'PD2'

Value Valid Label Frequency % of Valid % of All
. Missing missing 3,232
15.58%
1 Valid definitely identical 357
25.96%
1.72%
2 Valid probably identical 68
4.95%
0.33%
3 Valid definitely fraternal 870
63.27%
4.19%
4 Valid probably fraternal 80
5.82%
0.39%
6 Missing refused 6
0.03%
7 Missing legitimate skip 16,114
77.68%
8 Missing don't know 18
0.09%
Total Responses Valid Invalid Min Max
20745 1375 19370 1 4

Representation

Representation Type
Code List
Selection Style
SelectOne
Measurement Unit
numeric
Measurement Unit
numeric
Aggregation Method
Unspecified
Temporal
False
Geographic
False

Source Questions

PD2

Lineage

  • Parents (1995) - PD2
    D2 IDENTICAL OR FRATERNAL-PQ
    • PD2
      2. In your opinion are {NAME} and {NAME} identical twins or fraternal tw ins?

Concordance

Add Health
Wave I
Parents (1995)
Parents (1995)
PD2
definitely identical
25.96%
probably identical
4.95%
definitely fraternal
63.27%
probably fraternal
5.82%
Add Health
Wave I
Parents (1995)
Parents (1995)
PD2
definitely identical
1.72%
probably identical
0.33%
definitely fraternal
4.19%
probably fraternal
0.39%
Dataset Variable Valid Invalid Min First Quartile Median Third Quartile Max Mean StdDev
Parents (1995) PD2 1,375 19,370 1 4
Add Health
Wave I
Parents (1995)
Parents (1995)
PD2
definitely identical 1
probably identical 2
definitely fraternal 3
probably fraternal 4