Table 4.

Mean percentage of metric errors committed to the MEM shape by pigeons and people in Experiment 2

	Pigeons		Human Partial Group
	Partial group	Consistent group
Trio 1
M ± S.E.	68.8 ± 5.3	77.3 ± 7.4	77.3 ± 5.8
One-tailed t-test	3.56*	3.69*	4.69***
Trio 2
M ± S.E.	70.9 ± 3.7	82.1 ± 7.9	62.8 ± 7.2
One-tailed t-test	5.71**	4.02**	1.8*
Trio 3
M ± S.E.	51.6 ± 1.6	55.6 ± 2.0	65.2 ± 8.0
One-tailed t-test	0.99ns	2.78*	1.89*

^nsp>0.05

^*p<0.05

^**p<0.01

^***p<0.001