. Author manuscript; available in PMC: 2016 Sep 24.

Published in final edited form as: Hum Brain Mapp. 2016 May 24;37(8):2943–2958. doi: 10.1002/hbm.23218

Table V.

Mediation of the effect of prenatal alcohol exposure on WISC-IV processing speed and eyeblink conditioning by MD in three ROIs

Behavioral outcomes and ROIs	β₁	β₂	p^a
WISC-IV Processing Speed Index
L inferior longitudinal fasciculus	−0.29^*	−0.17	−1.76^†
Splenium of corpus callosum	−0.29^*	−0.08	−2.49^*
Eyeblink conditioning
Splenium of corpus callosum	−0.32^*	−0.18	−1.99^*
Isthmus of corpus callosum	−0.32^*	−0.15	−2.22^*

L = left;

^†

p <0.10,

p <0.05.

β₁ = Standardized correlation coefficient for AA/day before controlling for the mediating variable; β₂ = Standardized correlation coefficient for AA/day after controlling for MD in the ROI listed in the first column.

Significance of the reduction in β following the addition of the mediator to the model, based on the difference in coefficients method [Clogg et al., 1992].