Skip to main content
. 2010 Apr 12;365(1543):1099–1109. doi: 10.1098/rstb.2009.0291

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