Table 1. Average delays to reinforcement and standard errors (in seconds) for data in the first condition of Experiment 1.

Delays	Pigeon 1		Pigeon 2		Pigeon 3		Overall
	M	SE	M	SE	M	SE	M	SE
Scheduled	58.05	1.94	58.81	1.93	59.82	1.97	58.89	1.12
Obtained	58.96	1.94	59.83	1.93	60.41	1.97	59.73	1.13