The correlation between IHTT and FA (alone) was highly significant for both groups combined (r(35)=−.502, p=.002), and was also significant when the control participants (r(19)=−.557, p=.013) and schizophrenia participants (r(16)=−.513, p=.042) were considered separately. A significant positive correlation was also observed across groups between FA and Mode (r(35)=.551, p=.001), which raised the issue of multicollinearity in the regression model. However, the Variance Inflation Factor (VIF) associated with the model was 1.436, which is well within the limits for acceptable multicollinearity outlined by Myers (1990).
