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Mean ± SD cognitive test scores
| Measure | OC | PLA |
|---|---|---|
| Acquisition | 84.6 ± 15.0 | 85.9 ± 16.1 |
| Learning rate | 5.1 ± 2.1 | 5.3 ± 2.5 |
| Proactive interference | 1.3 ± 1.7 | 1.3 ± 2.5 |
| Retroactive interference | 1.7 ± 2.8 | 1.8 ± 1.4 |
| Forgetting | 2.1 ± 2.8 | 2.9 ± 2.3 |
| Verbal fluency | 45.9 ± 12.7 | 40.7 ± 8.3* |
*Indicates significant difference between OC and PLA
