Table 3.

Principal components analysis indicates that the cognitive tests used in this study segregate into six major cognitive domains

	Construct
	1	2	3	4	5	6
	Verbal learning and memory	Mood state	Decision-making efficacy	Processing speed and efficiency	Visuospatial learning and memory	Vocabulary
RAVLT-D	0.898
RAVLT-I	0.881
RAVLT-L	0.842
RAVLT-R	0.702
DASS-S		0.905
DASS-A		0.891
DASS-D		0.858
GP-D			0.901
GP-ND			0.884
SCIT-ET			0.597
SCIT-RTH				0.895
SCIT-RTT				0.866
SCIT-EH			0.434	0.602
MCG-I					0.883
MCG-D					0.844
MCG-C					0.604
WTAR						0.854
COWAT						0.714

Abbreviations: COWAT, Controlled Oral Word Association Task; DASS, Depression, Anxiety and Stress Scale; DASS-A, DASS-Anxiety; DASS-D, DASS-Depression; DASS-S, DASS-Stress; GP-D, Grooved Pegboard using dominant hand; GP-ND, Grooved Pegboard using nondominant hand; MCG, Medical College of Georgia; MCG-I, MCG Immediate Recall Trial; MCG-D, MCG Delayed Recall Trial; MCG-C, MCG Copy Trial; RAVLT, Rey Auditory and Verbal Learning Task; RAVLT-D, RAVLT Delayed Recall Trial; RAVLT-I, RAVLT Immediate Recall Trial; RAVLT-R, RAVLT Recognition Trial; RAVLT-L, RAVLT Learning Trials I–V; SCIT, Subtle Cognitive Impairment Test; SCIT-E_H, error rates in the head of the data curve; SCIT-E_T, error rates in the tail of the data curve; SCIT-RT_T, response times in the tail of the data curve; SCIT-RT_H, response times in the head of the data curve; WTAR, Wechsler Test of Adult Reading.