Table 2.
Cognitive Scores.
| Time at Test | 4 yrs | 6 yrs | |||||
|---|---|---|---|---|---|---|---|
| Sex | Cases | Acq | Object Difference | Food Difference | Retention | Object Difference | Food Difference |
| Neo-C | |||||||
| ♀ | Neo-C-1 | 226 | 21 | 28 | 53 | 26 | 26 |
| ♂ | Neo-C-2 | 180 | 23 | 18 | 0 | 18 | 24 |
| ♀ | Neo-C-3 | 221 | 19 | 30 | 98 | 39 | 29 |
| ♂ | Neo-C-4 | 301 | 22 | 23 | 93 | 17 | 30 |
| X | 232 | 21.3 | 24.8 | 61 | 25 | 27.3 | |
| Neo-Aibo | |||||||
| ♀ | Neo-Aibo-1 | 179 | 22 | 18 | 146 | 11 | 8 |
| ♂ | Neo-Aibo-2 | 313 | 23 | 30 | 12 | 21 | 23 |
| ♀ | Neo-Aibo-3 | 120 | 2 | 27 | 94 | 14 | 26 |
| ♂ | Neo-Aibo-4 | 147 | 6 | 27 | - | - | - |
| ♀ | Neo-Aibo-5 | 262 | 5 | 25 | 9 | 24 | 30 |
| ♂ | Neo-Aibo-6 | 175 | 5 | 5 | 18 | −2 | 17 |
| X | 199.3 | 10.5 | 22 | 55.8 | 13.6 | 20.8 | |
Scores are total number of errors made before criterion days for the acquisition (Acq) of the concurrent discrimination task at 4 years of age and retention of the task two years later (6 years). Object difference scores and food difference scores obtained in the devaluation probe sessions at the two ages tested. Neo-C: animals with neonatal sham-operations and Neo-Aibo: animals with neonatal amygdala lesions.