Table 1.
Mean number of trials and mean number of errors (with s.e.) needed to reach a significant criterion in the discrimination and reversal phases of a visual discrimination task with pigeons, three corvid species and three species of Darwin's finches.
| species | n | disc | s.e. | reversal | s.e. | errors reversal | s.e. |
|---|---|---|---|---|---|---|---|
| pigeon C. livia | 8 | 40 | 168 | 99 | |||
| corvid species | |||||||
| pinyon jay G. cyanocephalus | 5 | 149,6 | 33,6 | 155,0 | 28,3 | ||
| western scrub jay A. californica | 5 | 136,8 | 20,9 | 191,0 | 35,7 | ||
| Clark's nutcracker N. columbiana | 5 | 122,4 | 8,18 | 142,6 | 3,6 | ||
| Darwin's finch species | |||||||
| small tree finch Camarhynchus parvulus | 8 | 41,1 | 18,4 | 76,3 | 13,8 | 37,4 | 6,8 |
| woodpecker finch C. pallida | 16 | 39,8 | 2,7 | 95,6 | 5,4 | 56,4 | 4,8 |
| medium ground finch Geospiza fortis | 8 | 56,1 | 9,2 | 93,7 | 12,5 | 46,4 | 7,9 |