Table 1.

Devaluation performance for the two tests. The number of M&M (M) and peanut (P) objects chosen by each monkey (control monkeys, Con1-Con4; monkeys with MDmc lesions, MD1-MD5) during the baseline sessions (mean of 2 baseline sessions for each test), and for sessions preceded by devaluation of either peanuts or M&Ms.

	Test 1				Test 2
	Baseline	Satiate M	Satiate P	Difference	Baseline	Satiate M	Satiate P	Difference
Case	M:P	M:P	M:P	score	M:P	M:P	M:P	score	Mean
Con1	30:0	21:9	30:0	9	30:0	9:21	30:0	21	15
Con2	18.5:11.5	2:28	30:0	28	11:19	0:30	27:3	27	27.5
Con3	18:12	1:29	19:11	18	18:12	2:28	30:0	28	23
Con4	21:9	7:23	29:1	22	20:10	6:24	29:1	23	22.5
Mean	21.9:8.1	7.8:22.2	27:3	19.25	19.8:10.2	4.3:25.7	29:1	24.75	22
MD1	21:9	8:22	27:3	19	15.5:14.5	5:25	25:5	20	19.5
MD2	19.5:10.5	16:14	27:3	11	13.5:16.5	6:24	25:5	19	15
MD3	16:14	10:20	21:9	11	17.5:12.5	11;19	23:7	12	11.5
MD4	29.5:0.5	27:3	29:1	2	25.5:4.5	20:10	27:3	7	4.5
MD5	17:13	6:24	26:4	20	12:18	6:24	19:11	13	16.5
Mean	20.6:9.4	13.4:16.6	26:4	12.6	16.8:13.2	9.6:20.4	23.8:6.2	14.2	13.4