Table 4.

The results of independent samples t-tests comparing WMC between groups, with groups defined by the component game types in the games that participants reported playing. Degrees of freedom are shown in brackets, and † indicates that equal variances were not assumed, as indicated by the results of Levene's test.

	Puzzle			Strategy			Action			Strategy & Action			Puzzle, Strategy & Action
Younger Adults	t	p	Cohen's d	t	p	Cohen's d	t	p	Cohen's d	t	p	Cohen's d	t	p	Cohen's d
No Games	0.39 (72)	0.701	0.10	−1.91 (37.487)†	0.063	−0.52	0.89 (71)	0.375	.23	−3.50 (127)	<0.001	−0.63	−2.49 (34.39)†	0.018	−0.69
Puzzle				−1.95 (45)	0.058	−0.57	0.47 (39)	0.644	0.15	−2.89 (95)	0.005	−0.71	−2.58 (39.356)†	0.014	−0.75
Strategy							2.13 (44)	0.039	0.63	−0.30 (100)	0.764	−0.07	−0.46 (48)	0.646	−0.13
Action										−3.20 (94)	0.002	−0.81	−2.61 (42)	0.012	−0.79
Strategy & Action													−0.36 (98)	0.721	−0.08
Older Adults
No Games	−4.32 (125)	<0.001	−0.83	−0.73 (126)	0.466	−0.14
Puzzle				2.56 (77)	0.012	0.58