Skip to main content
. Author manuscript; available in PMC: 2010 Nov 15.
Published in final edited form as: Twin Res Hum Genet. 2008 Dec;11(6):586–595. doi: 10.1375/twin.11.6.586

Table 5.

Stepwise Multiple Regression Analysis of MZ Differences in Classroom Experience as Predictors of MZ Differences in Achievement

Adjusted R2 Maths
0.16 (p <0.01)		 Science
0.10 (p < 0.05)
β t β t
Block 1
     Average day rating 0.42 2.98** 0.18 1.10
Block 2
     Total number of peer stressors −0.20 −1.31 −0.01 −0.09
     Upset caused by peer stressors −0.13 −0.90 0.04 0.28
     Total number of academic stressors 0.03 0.19 0.07 0.46
     Upset caused by academic stressors −0.10 −0.68 −0.14 −0.94
     Total number of teacher stressors 0.14 0.99 0.20 1.36
     Upset caused by teacher stressors 0.02 0.11 0.21 1.43
     Total positive teacher interactions −0.04 −0.26 0.01 0.08
     Flow in English −0.04 −0.25 −0.08 −0.32
     Flow in Mathematics −0.10 −0.67 −0.04 −0.17
     Flow in Science −0.03 −0.20 0.35 2.36*