Table A.2.

Reaction time: Output of the linear mixed model including parameter estimates and Type III tests. An asterisk indicates a significant P value (P < 0.05).

REACTION TIME
Fixed effect estimates	ESTIMATE	STD. ERROR	DF	t VALUE	P (>|t|)
INTERCEPT	−1.07852	0.04814	61.29	−22.405	<2e-16 *
AGE GROUP = YOUNG	−0.31183	0.06808	61.29	−4.581	2.33e-05 *
RESPONSE = LEFT	0.07397	0.02631	100.00	2.812	0.00593 *
RESPONSE = RIGHT	0.03901	0.02631	100.00	1.483	0.14126
AGE GROUP = YOUNG x RESPONSE = LEFT	−0.06165	0.03720	100.00	−1.657	0.10062
AGE GROUP = YOUNG x RESPONSE = RIGHT	−0.04834	0.03720	100.00	−1.299	0.19684
Type III tests of fixed effects	SS	NUM DF	DEN DF	F VALUE	P (>F)
AGE GROUP	0.251787	1	50	29.1041	1.876e-06 *
RESPONSE	0.048039	2	100	2.7764	0.06707
AGE GROUP x RESPONSE	0.026313	2	100	1.5208	0.22355