Table 3.
Fit statistics for models using no change-points, one change-point, or two change-points. Model fit was assessed using the likelihood ratio test, with bold text indicating the current model provides significantly better fit compared to the one prior
| No change-points | 1 change-point | 2 change-points | ||
|---|---|---|---|---|
| CVLT-IMM | −2 LL/DF | 6918.5/8 | 6745.4/10 | 6720.9/12 |
| p value | <0.0001 | <0.0001 | ||
| CVLT-LD | −2 LL/DF | 4629.7/8 | 4436.5/10 | 4428.9/12 |
| p value | <0.0001 | 0.022 | ||
| BVRT | −2 LL/DF | 5081.5/8 | 5013.0/10 | 5011.5/12 |
| p value | <0.0001 | 0.47 | ||
| TMT-A | −2 LL/DF | 8405.4/8 | 8302.8/10 | 8299.1/12 |
| p value | <0.0001 | 0.16 | ||
| TMT-B | −2 LL/DF | 8701.8/8 | 8626.8/10 | 8626.5/12 |
| P value | <0.0001 | 0.86 | ||
| Categories | −2 LL/DF | 4245.0/8 | 4073.8/10 | 4064.1/12 |
| P value | <0.0001 | 0.0078 | ||
| Letters | −2 LL/DF | 4582.4/8 | 4530.4/10 | 4523.9/12 |
| p value | <0.0001 | 0.039 | ||
| BNT | −2 LL/DF | 5152.7/8 | 4963.6/10 | 4949.9/12 |
| p value | <0.0001 | 0.0011 | ||
| Similarities | −2 LL/DF | 4221.8/8 | 4154.9/10 | 4147.3/12 |
| p value | <0.0001 | 0.022 | ||
| Card Rotations | −2 LL/DF | 7548.6/8 | 7468.6/10 | 7457.6/12 |
| p value | <0.0001 | 0.0041 | ||
| MMSE | −2 LL/DF | 3924.1/8 | 3726.4/10 | 3719.0/12 |
| p value | <0.0001 | 0.025 |
BNT, Boston Naming Test; BVRT, Benton Visual Retention Test; CVLT, California Verbal Learning Test; CVLT-IMM, CVLT immediate free recall; CVLT-LD, CVLT long delayed free recall; MMSE, Mini-Mental State Examination; TMT-A, Trail-Making Test-A; TMT-B, Trail-Making Test-B; −2LL/DF, −2*log likelihood/Degree of Freedom. Significant p-values indicate better model fit over the previous model, e.g., for CVLT-IMM, a one change-point model has a better fit than a no change-point model and a two change-point model has better fit than a one change-point model.