Table 1.
Correct choice rates in each trial type at the early and late stages of learning
|
Correct choice rates in monkey DN |
|
|
|
|
|
| Learning stage | N1 | N2 | N3 | R1 | R2 |
| Early stagea (8 DA cells) | 29.6 ± 15.6 | 49.7 ± 13.2 | 75.2 ± 14.1 | 98.4 ± 2.3 | 99.5 ± 1.5 |
| Late stageb (44 DA cells) | 18.3 ± 5.3 | 51.5 ± 10.0 | 89.9 ± 8.6 | 99.0 ± 2.1 | 98.3 ± 2.4 |
| Early plus late stages (52 DA cells)
|
20.0 ± 8.6
|
51.2 ± 10.4
|
87.7 ± 10.8
|
98.9 ± 2.1
|
98.5 ± 2.3
|
| Correct choice rates in monkey SK
|
|
|
|
|
|
| Learning stage | N1 | N2 | N3 | R1 | R2 |
| Early stagec (19 DA cells) | 17.2 ± 4.6 | 48.1 ± 10.9 | 76.2 ± 10.1 | 97.8 ± 4.0 | 93.9 ± 5.3 |
| Late staged (37 DA cells) | 16.8 ± 3.4 | 48.9 ± 8.4 | 92.1 ± 8.6 | 99.1 ± 1.4 | 99.3 ± 2.0 |
| Early plus late stages (56 DA cells)
|
16.9 ± 3.8
|
48.7 ± 9.2
|
86.7 ± 11.8
|
98.7 ± 2.6
|
97.4 ± 4.3
|
Results are expressed as the means ± SD of percentages.
a
Early stage of learning, days 1-36 of the study.
b
Late stage of learning, day 37 to month 7.
c
Early stage of learning, days 1-15 of the study.
d
Late stage of learning, day 16 to month 3.