Training studies	Reported cognitive measures	Training control group(s)	Study criticisms
TRAINING BENEFIT OBSERVED
Feng et al. (2007)	Mental rotation, UFOV	Ballance	d,e
Green and Bavelier (2003)	Various visual/attentional	Tetris	d,e
Green and Bavelier (2006a)	UFOV, Flanker	Tetris	d,e
Green and Bavelier (2006b)	Enumeration, object tracking	Tetris	d,e
Green and Bavelier (2007)	Visual acuity	Tetris	d,e
Green et al. (2010)	Decision making	The Sims 2	d,e
Li et al. (2009)	Contrast sensitivity	The Sims 2	d,e
Li et al. (2010)	Resistance to masking	The Sims 2	d,e
NO TRAINING BENEFIT OBSERVED
Boot et al. (2008)	12 Cognitive measures	Tetris, no game	d,e

^aOvert recruiting (possible differential demand characteristics).

^bUnspecified recruiting method.

^cPotential third-variable/directionality problems (cross-sectional design).

^dNo test of perceived similarity of tasks and gaming experience.

^ePossible differential placebo effects.

Classification is based on the design and reported methods of the study, not on the results. For example, a study producing a null result might still be listed as subject to third-variable problems if it was cross-sectional. As noted in the text, underreporting of methods makes it unclear how many distinct video game training replications exist.