Table 2.

The results, from younger and older participants, of independent samples t-tests comparing WMC between groups when game-playing groups were defined by the game type that featured most in the games listed by the participants. Degrees of freedom are shown in brackets. † indicates that equal variances were not assumed, as indicated by the results of Levene's test. As we had not observed a significant interaction between game group and age, we applied a Bonferroni correction for the nine comparisons reported, such that p < 0.006 was considered statistically significant.

	Puzzle			Strategy			Action
	t	p	Cohen's d	t	p	Cohen's d	t	p	Cohen's d
Younger adults
No Games	−0.75 (84)	0.453	−0.17	−2.28 (94)	0.025	−0.47	−2,73 (126.278)†	0.007	−0.46
Puzzle				−1.38 (74)	0.171	−0.32	−1.53 (111)	0.130	−0.32
Strategy							0.03 (121)	0.980	0.01
Older adults
No Games	−3.62 (145)	<0.001	−0.61	−1.20 (45.826)†	0.236	−0.28
Puzzle				1,17 (91)	0.245	0.25