. Author manuscript; available in PMC: 2011 Nov 12.

Published in final edited form as: Dev Psychol. 2006 Jan;42(1):98–116. doi: 10.1037/0012-1649.42.1.98

Table 1.

Month-to-Month Correlations for Three Online Measures

Age	RT (ms)^a	Accuracy^b	VRT (ms)^c
15 to 18 months	.21	.27	.56^**
18 to 21 months	.39^*	.49^**	.71^**
21 to 25 months	.31	.34^*	—

Note. RT = reaction time; VRT = visual reaction time. Dash indicates data are not available.

Mean response latency to shift to the target picture.

Mean proportion of correct shifts to the target picture.

Mean response latency to orient to a peripheral visual stimulus with no speech stimulus.

p < .05.

^**

p < .01.