Table 1.

Intermodal relationships of hippocampal GABA

Intermodal relationship	N	Robust	Out	Control	Functional specificity	Anatomical specificity
A. HIP GABA: HIP BOLD
No-Think	18	−0.49*	2	−0.58*	−0.48*	−0.53*
Think	18	−0.47*	1	−0.48*	−0.61*	−0.59*
Stop	18	−0.19	0	−0.08	–	–
Go	18	0.23	0	0.15	–	–
B. HIP GABA: Behavior
SIF	18	0.45*	1	0.57*	0.71*	0.57*
SSRT	18	0.15	1	0.23	–	–
C. HIP GABA: PPI
DLPFC	18	−0.57*	0	−0.56*	–	−0.57*

Robust = skipped correlation using Pearson’s product-moment r-value on data with bivariate outliers removed⁵³. Out = number of bivariate outliers automatically removed⁵³. Degrees of freedom on the skipped correlation = n −2 − Out. Control = partial correlation controlling for Sex, levels of hippocampal glutamate (HIP Glu/Cre), and hippocampal gray matter concentration (HIP GM). Degrees of freedom on the Control partial correlation = n − 5− Out. Functional specificity = partial correlation controlling for Sex, HIP Glu/Cre, HIP GM, and the covariates from the Stop-Signal Task. For the HIP BOLD analyses, hippocampal BOLD response on Stop trials was used as a control for the No-Think partial correlation, and BOLD response on Go trials as a control for the Think partial correlation. For Behavior, the stop-signal response time was used as a control for the suppression-induced forgetting partial correlation. Degrees of freedom on the Functional Specificity partial correlation = n − 6 − Out. Anatomical specificity = partial correlation controlling for Sex, HIP Glu/Cre, HIP GM, and PFC GABA/Cre. Degrees of freedom on the Anatomical Specificity partial correlation = n − 6 − Out. Bold entries and asterisks indicate significance at 95% boot-strapped confidence intervals