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. Author manuscript; available in PMC: 2011 Sep 1.
Published in final edited form as: Multivariate Behav Res. 2010 Sep 1;45(5):828–852. doi: 10.1080/00273171.2010.519272

Table 2.

Estimated Coefficients of the Regression Model

First Order Model Polynomial Model
Effect Estimate SE Estimate SE
Intercept 3.99*** 0.05 3.92*** 0.07
X1 -0.02 0.02 -0.29** 0.11
X2 0.07 0.04 0.43** 0.17
X12 -0.11** 0.04
X22 -0.24** 0.09
X1*X2 0.30*** 0.10
R-square .002 0.02