Table 4. Descriptive Statistics of Computerized Cognitive Training Studies.

	Classic cognitive tasks	Neuropsychological software	Video games
	(n = 21)	(n = 9)	(n = 8)
Design, n. (%)
Randomized controlled trial	12 (57.1)	8 (88.9)	1 (12.5)
Non-Randomized controlled trial	3 (14.3)	0 (0.0)	1 (12.5)
Pre-post	6 (28.6)	1 (11.1)	6 (75.0)
Sample Size
Mean (SD)	87.4 (77.1)	115.9 (151.6)	40.9 (23.6)
Median (range)	53 (259)	45 (475)	41 (65)

Abbreviation: SD: Standard Deviation.