Table 6.

Effect sizes (Cohen’s d) for each of the outcome variables, with most-likely class estimate versus single-time-point attention scores as a predictor

Predictor	3-year AF		SRS-2		CBCL-ADHD		Vineland ABC
Sample	1	2	1	2	1	2	1	2
Most-likely class estimate	.462	.569	.480	.524	.426	.515	.478	.356
Duration of orienting at age 10 months	.146	.189	.003	< .001	.026	.002	.007	.015
Duration of orienting at age 15 months	.247	.085	.003	.001	.007	.022	.016	.068
Attentional focus at age 25 months	.233	.688	.008	.013	.085	.099	.017	.015
Attention shifting at age 25 months	.076	.272	.019	.026	.123	.113	.033	.026