Skip to main content
. Author manuscript; available in PMC: 2007 May 2.
Published in final edited form as: Pers Individ Dif. 2007 May;42(7):1209–1219. doi: 10.1016/j.paid.2006.09.028

Table 2.

Virtual twins IQ scores at time 1 and time 2

Time Meana (SD) Range r(T1, T2)
Full IQ scoreb
1 105.86 (11.41) 83–135
2 108.89 (13.25) 81–145
T1–T2  3.03 (12.38) −28–31 .50**
2005 Sample 105.87 (13.61) 70–148
Verbal IQ scorec
1 105.27 (12.28) 74–129
2 109.64 (12.62) 75–141
T1–T2  4.37 (11.90) −38–30 .54**
2005 Sample 105.17 (14.33) 62–150
Performance IQ score
1 105.48 (12.29) 73–135
2 106.87 (18.17) 68–146
T1–T2  1.39 (17.18) −39–42 .42**
2005 Sample 105.60 (13.58) 70–144
a

Individual data (N = 84; N = 221, 2005).

b

t(83) = −2.25, p < .05.

c

t(83) = −3.36, p < .001.

**

p < .01.