. Author manuscript; available in PMC: 2011 Sep 1.

Published in final edited form as: Psychol Aging. 2010 Sep;25(3):545–559. doi: 10.1037/a0018498

Table 5.

Table 5a
Logistic Regression Analyses of the ability of Incongruent Color Naming Errors to improve predictability of DAT (Healthy Old vs. Very Mild DAT) beyond predictions based upon current psychometric tests.
Psychometric Test	Initial regression model	Nagelkerke R²	After adding incongruent color naming errors
Psychometric Test	Initial regression model
	Initial χ²(1)	Initial R²	Δ χ²	Δ R²	Total R²
Logical Memory^a	6.70^*	.099	16.39^*	.215	.314
Delayed Logical Memory	8.30^*	.122	15.87^*	.205	.327
Associate Recognition	11.30^*	.164	12.20^*	.155	.319
Associate Recall^a	7.03^*	.105	17.15^*	.222	.327
Selective Reminding Task	16.76^*	.245	9.65^*	.121	.366
Trail Making (Form A)^a	0.36	.006	22.16^*	.301	.307
Trail Making (Form B)^a	8.58^*	.126	12.56^*	.164	.290
WAIS-R Digit Symbol^a	6.72^*	.100	14.37^*	.190	.290
Forward Digit Span^a	0.23	.003	20.97^*	.288	.291
Backward Digit Span^a	3.87^*	.058	17.57^*	.236	.294
WAIS-R Block Design^a	9.20^*	.135	13.06^*	.169	.304
Benton Copy (Form D)^a	1.19	.018	20.97^*	.285	.303
WAIS-R Information^a	3.64^{^}	.055	17.65^*	.237	.292
Boston Naming Test^a	5.74^*	.086	15.85^*	.210	.296
Animal Fluency	3.80^{^}	.057	17.21^*	.232	.289
Word Fluency ^a	6.49^*	.096	15.05^*	.199	.295
Mini Mental State Exam	8.15^*	.120	14.10^*	.184	.304
National Adult Reading Test	2.96^{^}	.045	17.95^*	.243	.288

Table 5b
Logistic Regression Analyses of the ability of current psychometric tests to improve predictability of DAT (Healthy Old vs. Very Mild DAT) beyond predictions based upon Incongruent Color Naming Errors.

Initial regression model	Nagelkerke R²	After adding Individual Psychometric Battery Predictors

Initial χ²(1)	Initial R²	Variable	Δ χ²	Δ R²	Total R²
20.90^*	.287	Logical Memory^a	2.19	.027	.314
20.90^*	.287	Delayed Logical Memory	3.26^{^}	.040	.327
20.90^*	.287	Associate Recognition	2.56	.032	.319
20.90^*	.287	Associate Recall^a	3.33^{^}	.040	.327
20.90^*	.287	Selective Reminding Task	6.27^*	.079	.366
20.90^*	.287	Trail Making (Form A)^a	1.61	.020	.307
20.90^*	.287	Trail Making (Form B)^a	0.24	.003	.290
20.90^*	.287	WAIS-R Digit Symbol^a	0.19	.003	.290
20.90^*	.287	Forward Digit Span^a	0.30	.004	.291
20.90^*	.287	Backward Digit Span^a	0.54	.007	.294
20.90^*	.287	WAIS-R Block Design^a	1.35	.017	.304
20.90^*	.287	Benton Copy (Form D)^a	1.26	.016	.303
20.90^*	.287	WAIS-R Information^a	0.38	.005	.292
20.90^*	.287	Boston Naming Test^a	0.69	.009	.296
20.90^*	.287	Animal Fluency	0.10	.002	.289
20.90^*	.287	Word Fluency^a	0.63	.008	.295
20.90^*	.287	Mini Mental State Exam	1.34	.017	.304
20.90^*	.287	National Adult Reading Test	0.00	.001	.288

Note.

denotes tasks used by Balota et al. (in press).

p < .05.

^{^}

p <.10

WAIS-R = Wechsler Adult Intelligence Test—Revised. The Δ χ² column indicates the increment in χ² statistics after adding Incongruent Color Naming errors in the second step of the model.

Note.

denotes tasks used by Balota et al.(in press).

p < .05.

^{^}

p < .10.

WAIS-R = Wechsler Adult Intelligence Test—Revised. The Δ χ² column indicates the increment in χ² statistics after adding psychometric tests in the second step of the model.