Page 237 - Like me, or else... - Michelle Achterberg
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                                Fronto-striatal connectivity predicts patience
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 see Table 3 and Figure 4. Age at T1 and MD did not significantly predict future discounting behavior. The same analyses were performed with non-linear age changes (age2 and age3). On top of delay of gratification skills and FA at T1, age2 and age3 did not significantly predict future discounting behavior. Thus, while accounting for behavioral performance at baseline, FA within the fronto-striatal tract explains unique variance in future delay of gratification skills.
We also investigated whether delay of gratification skills at T1 was predictive of fronto-striatal white matter integrity at T2. We entered FA at T2 as dependent variables and FA, Age and delay of gratification skills (AUC normalized) at T1 as predictor. The same analyses were conducted with MD. Linear regression analyses showed that both FA (β=-.018, p=.763) and MD (β=- .008, p=.895) at T2 were not significantly predicted by delay of gratification skills at T1.
Figure 4. Delay of gratification skills (AUC normalized) at T2 was predicted by delay of gratification skills (AUC normalized) at T1 and FA of the frontostriatal tract at T1. The y-axis displays the unstandardized predictive value of the regression model with AUC (normalized), age, FA of the frontostriatal tract, and MD of the frontostriatal tract at T1 as predictors.
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