Table 2.

Cognitive composite scores

Cognitive domain	Neuropsychological tests	Coefficient
Information processing speed	WAIS-IV Digit Symbol Test [total correct] D-KEFS CWIT color/reading [time] TMT A [time]	α = .78
Attention and working memory	PASAT – 2 and 3 [total] d2 Test of Attention [global performance] RAVLT [first recall A]	α = .77
Executive functions	D-KEFS CWIT inhibition/flexibility [time] D-KEFS Verbal Fluency Test: switching [total] TMT B [time]	α = .67
Lexical access	Verbal Fluency Tests: phonemic, semantic [total]	r = .37
Verbal learning	WMS-III LM subtest [total immediate recall] RAVLT [total learning: trial 1 to 5]	r = .27
Verbal memory	WMS-III LM subtest [delayed recall A and B] RAVLT [delayed recall]	α = .66

WAIS-IV = Wechsler Adult Intelligence Scale Fourth Edition; D-KEFS = Delis–Kaplan Executive Function System; CWIT = Color-Word Interference Test; TMT = Trail Making Test; PASAT = Paced Auditory Serial Addition Test; RAVLT = Rey Auditory Verbal Learning Test; LM = Logical Memory; α = Cronbach’s α; r = Pearson’s r