Table 4.
Novelty, frequency dependence and flower colour choice by bumble-bees
| Trained on flowers | Tested on flowers | n | Z- or t-test estimate | P-value |
|---|---|---|---|---|
| (A) Novelty | ||||
| Blue only | 80B:20W | 108 | –0·39 | 0·70 |
| Blue only | 50B:50W | 227 | 0·60 | 0·55 |
| Blue only | 20B:80W | 116 | –0·60 | 0·55 |
| (B) Frequency dependence | ||||
| 80B:20W | 80B:20W | 213 | –0·11 | 0·91 |
| 50B:50W | 50B:50W | 210 | –0·20 | 0·84 |
| 20B:80W | 20B:80W | 109 | –0·87 | 0·39 |
The P-value is based on a Z-test where the estimates for the population mean and its standard error were obtained using a generalized linear mixed model with a binomial distribution and a logit regression function using Proc Glimmix in SAS 9.3.