Table 1.

Summary of experiments.

	Animals	Pretests			Conditioning	First test	Second test	Third test	LTM test
Exp. 1	Group 1	G/E			G+suc	G+/E−			G+/E−
	n = 8				/
					E−
	Group 2	E/G			E+suc	E+/G−			E+/G−
	n = 8				/
					G−
Exp. 2	Group 3	C[−]	C[+]	C[−]	C[−]+suc	C[−]+	C[+]	C[−]+
	n = 8	/	/	/	/	/	/	/
		C[+]	L[−]	L[−]	L[−]−	L[−]−	L[−]−	C[+]
	Group 4						C[−]+	C[+]
	n = 8						/	/
							C[+]	L[−]−
Exp. 3	Group 1	C[−]	L[−]	C[−]	C[−]+suc	C[−]+	L[−]−	C[−]+
	n = 12	/	/	/	/	/	/	/
		G	I	L[−]	L[−]−	L[−]−	I	G
	Group 2		C[+]				C[+]
	n = 12		/				/
			E				E

Pretest, Odors presented associated with water; Conditioning, +suc, odor paired with sucrose (CS+); −, odor paired with water (CS−); Tests, +, odor previously used as a CS+; −, odor previously used as a CS−; no sign, this odor has not been included in the conditioning.