Table 2.

Definitions of the key outcome measures of the Cambridge Neuropsychological Test Automated Battery (CANTAB).

Constructs	Task Name	Outcome Variable	Definition
Shift	Intra-Extra-Dimensional Shift (IED)	Total errors adjusted	The total number of times that the subject chose a stimulus incompatible with the current rule, plus, for each problem that was not reached (if any), an adjustment is made to the score.
Working memory	Spatial Working Memory (SWM)	Between errors	The total number of times the subject revisits a box in which a token has previously been found in the same problem (calculated for assessed problems only).
Plan	Stockings of Cambridge (SOC)	Problems solved in minimum moves	The number of times the subject has successfully completed a problem in the minimum possible number of moves.
Inhibit	Stop Signal Task (SST)	Stop signal reaction time (SSRT)	The length of time between the go stimulus and the stop stimulus at which the subject is able to successfully inhibit their response on 50% of trials.