. 2006 Jan;85(1):3–21. doi: 10.1901/jeab.2006.132-04

Table 2. Mean proportion of RI choices and switches and standard deviations per session for Condition 2 of Experiment 1.

Proportion	Pigeon 1		Pigeon 2		Pigeon 3
	Pigeon 1		Pigeon 2		Phase 1: crf-FI 14 s		Phase 2: crf-FI 10 s
	M	SD	M	SD	M	SD	M	SD
RI choices	0.91	0.06	0.97	0.02	0.87	0.28	0.89	0.09
Switches	0.52	0.14	0.36	0.16	0.42	0.28	0.56	0.19

Note. For Pigeon 3 there are two phases. Phase 1 corresponds to Sessions 1 through 20, with crf-FI 14 s; Phase 2 corresponds to Sessions 21 through 40, where the crf-FI value was decreased to 10 s.