Table 2.

Cogstate Brief Battery tests and outcome measures

Test	Abbreviation	Domain	Paradigm	Completion criterion	Performance criterion	Outcome measures	Range
Detection	DET speed	Psychomotor function	Simple reaction time	≥100%of trial responses	≥70%accuracy	reaction time in ms (speed), normalized by log10 transformation	0 to 3.69*
Identification	IDN speed	Attention	Choice reaction time	≥100%of trial responses	≥70%accuracy	reaction time in ms (speed), normalized by log10 transformation	0 to 3.69*
One Card Learning	OCL accuracy	Visual learning	Pattern separation	≥100%of trial responses	≥40%accuracy	proportion of correct answers (accuracy), normalized by arcsine square-root transformation	0–1.57
One Back	ONB speed	Working memory	N-back	≥100%of trial responses	≥50%accuracy	reaction time in ms (speed), normalized by log10 transformation	0 to 3.69*
	ONB accuracy					proportion of correct answers (accuracy), normalized by arcsine square-root transformation	0–1.57
Psychomotor function and attention	DET/IDN speed	Composite	Composite	2/2 test instances available	2/2 test instances available	average of z-scores for DET and IDN speed	–5 to 5
Learning and working memory	LWM accuracy	Composite	Composite	2/2 test instances available	2/2 test instances available	average of z-scores for OCL and ONB accuracy	–5 to 5
Learning and working memory processing speed	OCL/ONB speed	Composite	Composite	2/2 test instances available	2/2 test instances available	average of z-scores for OCL accuracy and ONB speed	–5 to 5

^*Reaction times longer than 5 s (i.e., log10 [5000]) are excluded as reflecting responses that are abnormally slow.