Table A1.

regression analyses using RT and error difference scores

	Response times
Cost	Predictor	B	S.E. B	β	p
Global switch costs	Age	225.88	76.59	.28	.004*
	Inhibition	−31.75	46.89	−.05	.50
	Resistance to PI	57.93	52.38	.10	.27
	WM	−155.26	40.47	−.29	< .001*
Local switch costs	Inhibition	−12.15	20.08	−.06	.55
	Resistance to PI	38.02	22.78	.18	.10
	WM	−.73	15.14	−.01	.96
N-2 repetition costs	Age	50.93	17.87	.29	.005*
	Inhibition	−14.96	10.94	−.11	.17
	Resistance to PI	−14.98	12.22	−.12	.22
	WM	−12.66	9.44	−.12	.18
	Error rates
Cost	Predictor	B	S.E. B	β	p
Global switch costs	Age	−.004	.009	−.05	.63
	Inhibition	−.002	.006	−.02	.77
	Resistance to PI	.01	.006	.19	.052
	WM	−.01	.005	−.21	.01*
Local switch costs	Inhibition	−.01	.01	−.10	.34
	Resistance to PI	.01	.01	.10	.35
	WM	−.009	.008	−.13	.23
N-2 repetition costs	Age	.000	.005	−.009	.93
	Inhibition	.001	.003	.04	.66
	Resistance to PI	.009	.003	.25	.01*
	WM	.004	.003	.14	.12

^*p < .05

Note. S.E. = standard error