Normative data are provided in z-score units, presenting the number of standard deviations from the mean represented by each raw score.
Where possible, all norms are coded such that higher (or more positive) z scores represent better performance whereas lower (or more negative) z scores represent poorer performance.
See below table for description of test-specific column headings.
SRT = Simple Reaction Time scores, or median response time in milliseconds.
CRT.RT = Choice Reaction Time scores, median response time (correct trials) in milliseconds.
CRT.ACC = Choice Reaction Time accuracy, or proportion correct responses.
BDS = Backward digit span scores, or maximum sequence length accurately recalled.
FDS = Forward Digit Span scores, or maximum sequence length accurately recalled.
DSM = Digit symbol matching scores, or number of digits and symbols correctly matched in 90 seconds.
Matrix = Matrix reasoning scores: total number correct (36 maximum).
CPT.C = Gradual onset continuous performance test criterion score, based on signal detection theory. Higher scores indicate faster or more impulsive responses.
CPT.D = Gradual onset continuous performance test discrimination score, based on signal detection theory. Higher scores indicate more accurate responses (better performance).
Vis = Visual paired associates memory scores: total number correct (24 maximum).
Verb = Verbal paired associates memory scores: total number correct (25 maximum).
TA.total = Trail Making Test - Part A scores, based on total time to complete the trail (in milliseconds).
TA.errors = Trail Making Test - Part A errors.
TA.mRT = Trail Making Test - Part A median response time for each correct response.
TB.total = Trail Making Test - Part B scores, based on total time to complete the trail (in milliseconds).
TB.errors = Trail Making Test - Part B errors.
TB.mRT = Trail Making Test - Part B median response time for each correct response.