Table 3. Results of multiple binary logistic regression analyses in Study 1 including both decided and undecided voters.
| Step | Variable | B | SE | Wald | p | Exp(B) | Nagel-kerke’s R2 | % CCC |
| 1 | Constant | 2.889 | .096 | 914.479 | <.001 | 17.978 | .538 | 89.5 |
| IAT | 2.211 | .086 | 664.147 | <.001 | 9.123 | |||
| 2 | Constant | 1.663 | .205 | 65.493 | <.001 | 5.275 | .549 | 89.5 |
| IAT | 1.178 | .183 | 41.271 | <.001 | 3.247 | |||
| Decidedness | 1.434 | .233 | 37.824 | <.001 | 4.197 | |||
| IAT* Decidedness | 1.214 | .208 | 33.906 | <.001 | 3.366 | |||
| 3 | Constant | 4.522 | .310 | 213.234 | <.001 | 92.051 | .852 | 97.1 |
| IAT | .538 | .234 | 5.305 | .021 | 1.713 | |||
| Decidedness | .155 | .305 | .258 | .612 | 1.167 | |||
| IAT* Decidedness | .254 | .282 | .813 | .367 | 1.289 | |||
| Explicit | 3.812 | .202 | 355.389 | <.001 | 45.226 | |||
| 4 | Constant | 3.333 | .405 | 67.852 | <.001 | 28.029 | .856 | 97.1 |
| IAT | −.074 | .274 | .062 | .804 | .929 | |||
| Decidedness | 1.363 | .467 | 8.512 | .004 | 3.909 | |||
| IAT* Decidedness | .164 | .285 | .329 | .566 | 1.178 | |||
| Explicit | 2.338 | .429 | 29.710 | <.001 | 10.357 | |||
| Explicit* Decidedness | 1.349 | .479 | 7.951 | .005 | 3.855 | |||
| IAT* Explicit | −.827 | .243 | 11.596 | .001 | .438 |
Note. N = 3594. B: regression weight B; SE: standard error of the regression weight B; Wald: Wald criterion; Exp(B): Odds ratio. Relative amount by which the odds increase (Exp(B)>1.0) or decrease (Exp(B)<1.0) when the value of the predictor is increased by 1 unit; CCC: correctly classified cases; DV: voting behavior (0 = McCain, 1 = Obama). The IAT, explicit measure and decidedness information used in this analysis was obtained at time 1. All continuous variables were z-standardized prior to the analyses.