Bivariate correlations between biographical, cognitive and white matter variables.

*P**pISD = Intraindividual variability; SRT = Simple RT; CRT = Choice RT; ICV = Intracranial volume; WMH = white matter hyperintensities (ICV and WMH = mm3); Gender, 1 = male, 2 = female.PpISD：个体内变异性（Intraindividual variability）；SRT：简单反应时（Simple RT）；CRT：选择反应时（Choice RT）；ICV：颅内体积（Intracranial volume）；WMH：脑白质高信号（white matter hyperintensities），其中ICV与WMH的计量单位为mm³；性别：1代表男性，2代表女性。