Table 1. Sequence of experimental conditions and the delays to food (in s) on the two alternatives in all seven components in a condition. All conditions were conducted for 50 sessions, and food durations on the two alternatives were both four 1.2-s presentations.

Condition	Phase	Delay to food (s)
		Left	Right
4*	baseline	0	0
17	1	0	2
18	1	4	0
19	1	0	6
20	1	8	0
21	2	1	1
22	2	2	2
23	2	3	3
24	2, 3	4	4
25	3	2	6
26	3	7	1
27	3	3	5
28	3	1	7
29	3	5	3
30 (Rep Cond. 24)	2,3	4	4

^*Condition 4 was reported by Davison and Baum (2003) and was not repeated here.