Table 2.

Neurocognitive outcomes used in the selected studies.

Cognitive domain	Cognitive variable
Verbal learning	Wechsler Memory Scale—Revised verbal memory composite
	California Verbal Learning Test
	Hopkins verbal learning test
Working memory	Auditory Consonants Trigram
	digital span test (WAIS-R)
	The n-back component of the task
Executive function	Wisconsin Card Sorting