The CANTAB (Cambridge Cognition Limited, 2005) measures various nonverbal components of neuropsychological functioning with an emphasis on executive functioning and has high internal consistency and construct validity (Luciana, 2003). The CANTAB variables were the z-scores from the higher order cognitive subtests [(Delayed Matching to Sample (DMS), Intra-Extra Dimensional Shift Total Errors (IED-TE), IED Stages Completed (IED-SC), and Spatial Working Memory (SWM)].
