Drug | Effect | % Generalization | Rates of Responding | ||||
---|---|---|---|---|---|---|---|

df | F Value | PValue | df | F Value | P Value | ||

Nicotine | Main |
F
_{2,96}
| 0.102 | .903 |
F
_{2,105}
| 2.482 | .108 |

Interaction |
F
_{10,96}
| 0.336 | .969 |
F
_{10,105}
| 0.782 | .646 | |

Amphetamine | Main |
F
_{2,84}
| 3.639 | .044 |
F
_{2,105}
| 0.216 | .808 |

Interaction |
F
_{8,84}
| 0.571 | .799 |
F
_{10,105}
| 0.457 | .914 | |

Cocaine | Main |
F
_{2,84}
| 3.489 | .049 |
F
_{2,105}
| 2.403 | .115 |

Interaction |
F
_{8,84}
| 0.827 | .584 |
F
_{10,105}
| 1.342 | .218 |

Shown are the *F* values, degrees of freedom (df), and significance levels of difference (*P* values) revealed by ANOVA of the dose-response functions (percentage of generalization to the training dose of nicotine and changes in rates of responding) for each drug. Two-way repeated measures ANOVA on one repeated factor was used to depict quantitative (main effect) and qualitative (interaction) differences in the effects of drugs on percentage generalization and rates of responding in water, 0.25-CAFF, and 1.0-CAFF groups. The dose-response functions are plotted in Figs. 5 and 6.