. 2014 Sep 3;5:954. doi: 10.3389/fpsyg.2014.00954

Table 2.

Mean statistics and findings of regression analyses for participants' performance in the Simon task.

		Mean	SD	R² change	L1 Proficiency			L2 Proficiency
					*beta*	t₍₉₃₎	p	*beta*	t₍₉₃₎	p
Overall	RT	874	278	0.18^*	−0.28^*	2.62	0.01	−0.23^*	2.22	0.02
	Error	23	13	0.01	−0.11	0.93	0.18	0.02	0.19	0.43
	μ	632	170	0.10^*	−0.20^*	1.80	0.04	−0.18^*	1.70	0.045
	σ	136	69	0.08^*	−0.15	1.25	0.11	−0.17	1.51	0.07
	τ	244	166	0.16^*	−0.27^*	2.38	0.01	−0.20^*	1.83	0.04
Simon effect	RT	112	114	0.04	0.06	0.48	0.32	−0.23^*	1.94	0.03
	Error	16	17	0.00	0.01	0.09	0.47	−0.01	0.10	0.47
	μ	129	134	0.06^*	0.15	1.24	0.11	−0.29^*	2.45	0.01
	σ	9	96	0.03	0.19	1.50	0.07	−0.15	1.25	0.11
	τ	−16	124	0.01	−0.12	0.95	0.18	0.11	0.91	0.19
Congruent trials	RT	827	269	0.17^*	−0.29^*	2.67	0.01	−0.21^*	2.00	0.02
	Error	15	11	0.01	−0.14	1.15	0.13	0.03	0.29	0.39
	μ	582	172	0.08^*	−0.21^*	1.90	0.03	−0.13	1.27	0.11
	σ	119	78	0.06^*	−0.17	1.34	0.09	−0.12	1.03	0.15
	τ	247	155	0.17^*	−0.27^*	2.38	0.01	−0.21^*	1.94	0.03
Incongruent trials	RT	938	300	0.18^*	−0.24^*	2.17	0.02	−0.27^*	2.64	0.01
	Error	31	19	0.004	−0.07	0.58	0.28	0.01	0.08	0.47
	μ	711	192	0.13^*	−0.08	0.78	0.22	−0.32^*	3.14	<0.01
	σ	128	89	0.06^*	0.06	0.46	0.33	−0.27^*	2.30	0.01
	τ	231	184	0.13^*	−0.31^*	2.62	0.01	−0.10	0.93	0.18

p < 0.05 (one-tailed). The R² change column shows the increase in R² after adding L1 proficiency and L2 proficiency predictor variables and its significance. The L1 proficiency and L2 proficiency columns show the significance of the L1 proficiency and L2 proficiency predictor variables in the regression analyses, respectively.