Transfer learning statistics
| Case | M1(SEM) | M2 (SEM) | T1 (df = 2) | T2 (df = 2) | p1 | p2 |
|---|---|---|---|---|---|---|
| M1 H-L | 91 (2.9) | 68 (3.4) | 41.2 | 21.6 | 0.0006* | 0.002* |
| M2 H-L | 83 (0.8) | 54 (5) | 14.7 | 8.7 | 0.004* | 0.01* |
| M1 L-M | 81 (2.5) | 48 (1.9) | 68.7 | 16.9 | 0.0002* | 0.003* |
| M2 L-M | 77 (1.8) | 59 (4.7) | 8 | 12 | 0.01* | 0.007* |
| TS1 H-L | 82 (7) | 50 (4.12) | 6.2 | 8.7 | 0.02* | 0.01* |
| TS2 H-L | 79 (7.3) | 71 (2.6) | 2.9 | 31.5 | 0.1 | 0.001* |
| TS3 H-L | 82 (8.7) | 61 (3.5) | 7.6 | 16.9 | 0.01* | 0.003* |
| TS4 H-L | 81 (4.3) | 48 (4.2) | 14.8 | 7.7 | 0.004* | 0.01* |
| TS5 H-L | 85 (4.9) | 42 (0.3) | 19.3 | 69.8 | 0.002* | 0.0002* |
| TS6 H-L | 82 (1.1) | 52 (4.1) | 18.6 | 9.6 | 0.003* | 0. 01* |
| TS1 L-M | 46 (2.5) | 61 (2.1) | -10.4 | 28.5 | 0.009* | 0.001* |
| TS2 L-M | 76 (3) | 56 (4.4) | 27.8 | 11.3 | 0.001* | 0.007* |
| TS3 L-M | 78 (3.8) | 66 (0.8) | 5.7 | 82.7 | 0.03* | 0.0001* |
| TS4 L-M | 65 (4.9) | 64 (5.6) | 0.2 | 11.9 | 0.9 | 0.007* |
| TS5 L-M | 63 (3.6) | 64 (1.2) | -0.43) | 54.2 | 0.7 | 0.0003* |
| TS6 L-M | 79 (3.8) | 72 (4.6) | 1.8 | 17.7 | 0.2 | 0.003* |
| R1 H-I | 67 (2) | 54 (10.7) | 3.1 | 4.2 | 0.09 | 0.053 |
| R2 H-I | 75 (2.9) | 74 (3.2) | 0.22 | 27.6 | 0.81 | 0.001* |
| R3 H-I | 74 (3.2) | 53 (12.3) | 2.9 | 3.5 | 0.1 | 0.07 |
| R4 H-I | 63 (8) | 43 (1.15) | 4.6 | 22 | 0.04* | 0.002* |
| R1 I-L | 82 (2.6) | 44 (4.8) | 13.4 | 5.0 | 0.005* | 0.03* |
| R2 I-L | 74 (5.9) | 47 (2.2) | 7.2 | 13.9 | 0.02* | 0.005* |
| R3 I-L | 70 (8) | 53 (5.2) | 6.1 | 7.9 | 0.03* | 0.015* |
| R4 I-L | 76 (5.2) | 57 (5.4) | 5 | 9.4 | 0.04* | 0.01* |
| R1 L-M | 52 (0.5) | 31 (3.4) | 11.2 | -1 | 0.008* | 0.4 |
| R2 L-M | 46 (2.8) | 30 (3.5) | 7 | -1.8 | 0.02* | 0.2 |
| R3 L-M | 49 (5.2) | 29 (5.13) | 4.1 | -1.6 | 0.056 | 0.2 |
| R4 L-M | 58 (6.8) | 36 (2.1) | 9.3 | 3.1 | 0.01* | 0.09 |
The mean behavioral performance pre- and post-transfer (M1,M2) and related SEM values are shown for all transfer cases for each individual animal of all three species (M, monkey; TS, tree shrew; R, rat) and transfer condition (H, high contrast; I, intermediate contrast; L, low contrast; M, minimal contrast); i.e., row TS4 H-L provides information on tree shrew 4 on the transfer from high- to low-contrast condition. Statistics for paired t tests are shown for t test T1, testing M1 against M2, as well as t test T2, testing M2 against chance performance (33%). Triangles denote transfer type (compare Fig. 3C), with full, partial, and no transfer denoted by purple, yellow, and gray, respectively.