Correlation matrix of individual tests from the PACC, category fluency. Cross-sectional relationships (Pearson's r) are represented in left panel, and correlations among slopes are represented in the right panel. Abbreviations: CAT, category fluency, MMSE, Mini–Mental State Examination, LMDR, Logical Memory Delayed Recall; DSC, Digit-Symbol Coding Test, FCSRT96, Free and Cued Selective Reminding Test–Free + Total.