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. Author manuscript; available in PMC: 2015 Oct 10.
Published in final edited form as: Neuroscience. 2014 Aug 15;278:51–61. doi: 10.1016/j.neuroscience.2014.07.076

Table 5.

Mediation models testing effects of age, RT and FA in CC-Genu on the age-BOLD relationship in the switch condition

R2 R2 change F Percentage attenuation Beta significance
WM mediation model in right DLPFC
Model 1
Age 0.085 5.78* 0.019
Model 2
CC-Genu 0.145 10.54** 0.042
Age 0.146 0.001 5.21** 98.82 0.833
Performance mediation model in right insula
Model 1
Age 0.15 10.45** 0.002
Model 2
RT 0.229 17.57*** 0.005
Age 0.258 0.029 10.11*** 80.67 0.138

Note: For Model 2, beta significance indicated beta value in full model in which both independent variable and mediator were entered in the regression model.

*

p < 0.05.

**

p < 0.01.

***

p < 0.001.