Table 1.

Performance measures of rats in the reversal-learning task under deterministic and probabilistic schedules of reinforcement

Study	Age (days)	Developmental age group	Weight (grams)	Deterministic schedule				Probabilistic schedule
				Total number of sessions	Total trials completed	Number of sessions the criterion was met	Total trials included in analysis	Total number of sessions	Total trials completed	Number of sessions the criterion was met	Total trials included in analysis
Cross-sectional (N = 40;24 M/16 F)	38 ± 1.15	Adolescence	69 ± 3	10.07 ± 0.83	2316 ± 160	2.79 ± 0.11	889 ± 52	4.21 ± 0.24	1405 ± 63	2.71 ± 0.19	983 ± 71
	59 ± 0.86	Adolescence	216 ± 11	6.00 ± 0.52	1486 ± 79	2.71 ± 0.16	890 ± 71	3.64 ± 0.50	1214 ± 115	2.57 ± 0.25	1035 ± 67
	79 ± 0.64	Adolescence	330 ± 23	6.31 ± 0.58	1686 ± 87	2.91 ± 0.25	979 ± 93	3.53 ± 0.18	922 ± 65	2.18 ± 0.29	896 ± 89
	123 ± 0.54	Adult	396 ± 17	7.13 ± 0.50	1566 ± 82	2.86 ± 0.08	849 ± 46	3.55 ± 0.21	1174 ± 51	2.69 ± 0.11	957 ± 52
Longitudinal (N = 16;8 M/8 F)	38 ± 0.76	Adolescence	71 ± 2	9.94 ± 0.85	2259 ± 136	3.00 ± 0	956 ± 27	4.31 ± 0.28	1393 ± 83	2.5 ± 0.18	883 ± 68
	55 ± 0.40	Adolescence	172 ± 6	3.88 ± 0.27	1109 ± 67	3.00 ± 0	908 ± 23	3.19 ± 0.21	1181 ± 58	2.94 ± 0.06	1109 ± 40
	74 ± 0.27	Adolescence	257 ± 15	3.25 ± 0.14	935 ± 39	3.00 ± 0	968 ± 17	3.06 ± 0.06	1059 ± 25	2.94 ± 0.06	1024 ± 34
	121 ± 0.59	Adult	362 ± 26	5.06 ± 0.59	1132 ± 91	2.94 ± 0.06	783 ± 31	3.94 ± 0.37	1245 ± 88	3.00 ± 0	1013 ± 15

Total number of sessions is the total number of sessions rats required to reach the reward criterion. Total trials are the total number of trials rats completed under each schedule. Values presented are mean ± SEM