FIGURE 3.

(A–C) Association between use of substance at time t + 1 for any (A) and primary substance (B) and fractional anisotropy (FA) values within left anterior corona radiata and corpus callosum and right anterior corona radiata and corpus callosum (C) for shorter, mean, and longer Stroop time centred around the week at time t. Legend: Illustration of the probability of use associated with FA value in our clusters dependingon Stroop Time performance at time t: shorter time compared to the rest of the week (‐1 standarddeviation) indicating better performance in red, habitual mean time for the week in blue andlonger time compared to the rest of the week (+1 standard deviation) indicating worstperformance in green. S.d.: standard deviation (centered about each individual's mean across the week).