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. Author manuscript; available in PMC: 2014 Feb 24.
Published in final edited form as: Dev Psychopathol. 2009 Winter;21(1):69–85. doi: 10.1017/S0954579409000054

Table 2. Results of the heart rate analysis.

Initial Model Final Model
Effect df1 df2 F df1 df2 F
Intercept 1 73.5 4809.33*** 1 77.2 5045.56***
Sex 1 73.5 0.94
Age 3 73.5 2.68 3 77.2 2.84*
Sex × Age 3 73.5 0.07
Linear trend 1 72.6 91.4*** 1 75.8 90.59***
Quadratic trend 1 71.9 83.21*** l 75.1 84.88***
Cubic trend 1 71.3 66.08*** 1 74.4 68.88***
Sex × Linear 1 72.6 1.61
Age × Linear 3 72.6 4.33** 3 75.8 4.02**
Sex × Quadratic 1 71.9 1.92
Age × Quadratic 3 71.9 7.38*** 3 75.1 7.04***
Sex × Cubic 1 71.3 2.03
Age × Cubic 3 71.3 8.71*** 3 74.4 8.42***
Sex × Age × Linear 3 72.6 2.32
Sex × Age × Quadratic 3 71.9 1.6
Sex × Age × Cubic 3 71.3 1.32
*

p < .05.

**

p < .01.

***

p < .001.