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. Author manuscript; available in PMC: 2008 Jul 1.
Published in final edited form as: Vision Res. 2007 Jun 29;47(16):2179–2186. doi: 10.1016/j.visres.2007.04.017

Table 3.

Univariate model fitting results

Model −2LL DF Δ−2LL ΔDF p value AIC LRT df p value
1.5 cpd
Saturated −1148.220 708 - - - - - - -
ACE −1138.337 714 9.883 6 .130 −2.117 - - -
ADE −1139.938 714 8.282 6 .218 −3.718 - - -
AE 1138.337 715 9.883 7 .195 4.117 1.601 1 .206
E −1133.745 716 14.475 8 .070 −1.525 4.592 1 .032
3.0 cpd
Saturated −826.918 708 - - - - - - -
ACE −821.906 714 5.012 6 .542 −6.988 - - -
ADE −822.417 714 4.501 6 .609 −7.499 - - -
AE 821.906 715 5.012 7 .658 8.988 0.511 1 .475
E −817.540 716 9.378 8 .311 −6.622 4.366 1 .037
6.0 cpd
Saturated −507.506 708 - - - - - - -
ACE −498.991 714 8.515 6 .203 −3.485 - - -
ADE −499.926 714 7.580 6 .271 −4.420 - - -
AE 498.991 715 8.515 7 .289 5.485 0.935 1 .334
E −469.054 716 38.452 8 <.001 22.452 29.937 1 < .001
12.0 cpd
Saturated 7.447 707 - - - - - - -
ACE 14.812 713 7.365 6 .288 −4.635 - - -
ADE 14.123 713 6.676 6 .352 −5.324 - - -
AE 14.812 714 7.365 7 .392 6.635 0.689 1 .407
E 23.200 715 15.753 8 .046 −0.247 8.388 1 .004
18.0 cpd
Saturated 359.488 700 - - - - - - -
ACE 364.969 706 5.481 6 .484 −6.519 - - -
ADE 364.561 706 5.073 6 .534 −6.927 - - -
AE 364.969 707 5.481 7 .602 8.519 0.408 1 .523
E 377.522 708 18.034 8 .021 2.034 12.553 1 < .001

Note. Δ−2LL based on comparison of each model with the saturated model. The LRT is based on a comparison of nested models; the E model is a nested submodel of the AE model, and the AE model is a nested submodel of the ADE model.