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. 2016 Dec;23(12):669–678. doi: 10.1101/lm.043513.116

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© 2016 Hosono et al.; Published by Cold Spring Harbor Laboratory Press

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Figure 6. — Acquisition and 1-d retention after two-trial conditioning (A,B) and after three-trial conditioning (C,D) with different ITIs. (A) Acquisition performance after two-trial conditioning. The percentage of MERs to the odor in the first trial was statistically compared with that in the second trial in each group (Cochran's Q test: 30 sec, n = 26, P = 0.00011, χ² = 15.0; 5 min, n = 23, P = 0.0455, χ² = 4.0; 7 min, n = 24, P = 0.014, χ² = 6.0; 10 min, n = 24, P = 0.045, χ² = 4.0; 15 min, n = 26, P = 1, χ² = 0; 1 h, n = 22, P = 1, X² = 0). The percentage of MERs at the second trial in the 1-h group was compared with those in other groups (LR test: P = 9.30 × 10⁻⁸, deviance = 41.02, df = 5; Fisher's exact test: 30 sec vs. 1 h: P = 1.03 × 10⁻⁶, odds ratio = Inf.; 5 min vs. 1 h: P = 0.046, odds ratio = Inf.; 7 min vs. 1 h: P = 0.18, odds ratio = Inf.; 10 min vs. 1 h: P = 0.022, odds ratio = Inf.; 15 min vs. 1 h: P = 1, odds ratio = Inf.) (B) One-day retention performance. The percentage of MERs to the CS was statistically compared with that to a novel odor in each group (McNemar's test: 30 sec, n = 26, P = 0.0026, χ² = 9.09; 5 min, n = 23, P = 0.016, χ² = 5.81; 7 min, n = 24, P = 0.22, χ² = 1.5; 10 min, n = 24, P = 1, χ² = 0; 15 min, n = 26, P = 1, χ² = 0; 1 h, n = 22, P = 0.29, χ² = 1.13). Percentages of MERs in the third trial did not significantly differ among the groups (LR test: P = 0.27, deviance = 3.86, df = 3) (C) Acquisition performances after three conditioning trials with different ITIs. The change in percentage of MERs to the CS with increase in the number of trials was statistically evaluated in each group (Cochran's Q test: 5 min, n = 32, P = 0.0011, χ² = 13.63; 7 min, n = 26, P = 3.25 × 10⁻⁵, χ² = 20.67; 10 min, n = 36, P = 0.00015, χ² = 17.64; 15 min, n = 26, P = 0.018, χ² = 8.0). (D) One-day retention performance. The percentage of MERs to the CS was statistically compared with that to a novel odor in each group (McNemar's test: 5 min, n = 32, P = 0.016, χ² = 5.79; 7 min, n = 26, P = 0.027, χ² = 4.9; 10 min, n = 36, P = 0.00066, χ² = 11.53; 15 min, n = 26, P = 0.0094, χ² = 6.75). (*) P < 0.05, NS: P > 0.05.