Table 3.

Model fitting results for decision time positive (DT+)

Model		−2LL	df	Vs model	χ 2	p
1	Saturated	10615.60	2,656
2	Drop covariances between Intercept, Linear slope and Quadratic slope within and between subjects	10630.38	2,665	1	14.77	.10
3	Drop variance Quadratic slope and familial covariance related to the Quadratic slope	10632.69	2,668	2	2.32	.51
4	Drop variance Linear slope and familial covariance related to the Linear slope	10657.63	2,671	3	24.93	<.001
5	Drop variance Intercept and familial covariance related to the Intercept	13754.38	2,671	3	3121.69	<.001
6	Drop sex effects means I, S, and Q	10634.64	2,671	3	1.95	.58
7	Drop age effects means I, S, and Q	10719.19	2,674	6	84.54	<.001
7a	Drop age effects means I	10713.79	2,672	6	79.15	<.001
7b	Drop age effects means S	10634.66	2,672	6	<1	.89
7c	Drop age effects means Q	10637.87	2,672	6	3.22	.07
7d	Drop age effects means S and Q	10637.88	2,673	6	3.24	.20
Decompose variance intercept into A, D, and E
8	Full ADE	10643.29	2,673
9	Drop D intercept	10644.29	2,674	8	1.00	.32
10	Drop A and D intercept	10664.45	2,675	8	21.16	<.001

Eq equal, −2LL minus 2 log likelihood, df degrees of freedom, vs versus, χ ² Chi square (difference in −2LL), p p-value, NS non significant