Table 1.

Transfer learning statistics

CaseM1(SEM)M2 (SEM)T1 (df = 2)T2 (df = 2)p1p2
M1 H-L91 (2.9)68 (3.4)41.221.60.0006*0.002*
M2 H-L83 (0.8)54 (5)14.78.70.004*0.01*
M1 L-M81 (2.5)48 (1.9)68.716.90.0002*0.003*
M2 L-M77 (1.8)59 (4.7)8120.01*0.007*
TS1 H-L82 (7)50 (4.12)6.28.70.02*0.01*
TS2 H-L79 (7.3)71 (2.6)2.931.50.10.001*
TS3 H-L82 (8.7)61 (3.5)7.616.90.01*0.003*
TS4 H-L81 (4.3)48 (4.2)14.87.70.004*0.01*
TS5 H-L85 (4.9)42 (0.3)19.369.80.002*0.0002*
TS6 H-L82 (1.1)52 (4.1)18.69.60.003*0. 01*
TS1 L-M46 (2.5)61 (2.1)-10.428.50.009*0.001*
TS2 L-M76 (3)56 (4.4)27.811.30.001*0.007*
TS3 L-M78 (3.8)66 (0.8)5.782.70.03*0.0001*
TS4 L-M65 (4.9)64 (5.6)0.211.90.90.007*
TS5 L-M63 (3.6)64 (1.2)-0.43)54.20.70.0003*
TS6 L-M79 (3.8)72 (4.6)1.817.70.20.003*
R1 H-I67 (2)54 (10.7)3.14.20.090.053
R2 H-I75 (2.9)74 (3.2)0.2227.60.810.001*
R3 H-I74 (3.2)53 (12.3)2.93.50.10.07
R4 H-I63 (8)43 (1.15)4.6220.04*0.002*
R1 I-L82 (2.6)44 (4.8)13.45.00.005*0.03*
R2 I-L74 (5.9)47 (2.2)7.213.90.02*0.005*
R3 I-L70 (8)53 (5.2)6.17.90.03*0.015*
R4 I-L76 (5.2)57 (5.4)59.40.04*0.01*
R1 L-M52 (0.5)31 (3.4)11.2-10.008*0.4
R2 L-M46 (2.8)30 (3.5)7-1.80.02*0.2
R3 L-M49 (5.2)29 (5.13)4.1-1.60.0560.2
R4 L-M58 (6.8)36 (2.1)9.33.10.01*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.