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Total percentage of dyads, chunking, and “other” responses on the Paced Auditory Serial Addition Test (PASAT), by high vs low ratio of choline/creatine (Cr/Ch) in the left frontal white matter. Differences between the high and low Ch/Cr groups were not statistically significant (P < 0.05), but had trends similar to those for the right frontal white matter (see Figure 3).
