Table 3.

Test stimulus arrays for the three conditioning groups

	Test stimuli
	Sucrose			l-Threonine			l-Serine			QHCla		Citric acida		NaCla
	CSb	High	Low	CSb	High	Low	CSb	High	Low	High	Low	High	Low	High	Low
Group 1	0.4 m	0.6 m	0.2 m		0.7 m	0.175 m		1.0 m	0.4 m	0.625 mm	0.325 mm	13.25 mm	6.25 mm	0.375 m	0.175 m
Group 2		0.6 m	0.2 m		0.7 m	0.175 m	0.6 m	1.0 m	0.4 m	0.625 mm	0.325 Mm	13.25 mm	6.25 mm	0.375 m	0.175 m
Group 3		0.6 m	0.2 m	0.35 m	0.7 m	0.175 m		1.0 m	0.4 m	0.625 mm	0.325 mm	13.25 mm	6.25 mm	0.375 m	0.175 m

^aHigh, Approximately 50% of the lick rate relative to water; low, ∼75% of the lick rate relative to water. For more details, see Materials and Methods.

^bThese were concentrations used in the discrimination experiment.