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Individual difference measures (Mean and SD) by study
| Primary study | Replication study | t-value | |
|---|---|---|---|
| Childhood unpredictability | 5.63 (5.05) | 6.10 (5.70) | −0.61 |
| Family income | 4.29 (1.39) | 4.55 (1.30) | −1.12 |
| Digit span | 10.85 (3.18) | 16.11 (5.50) | −6.72*** |
Note: Two-sample t tests were used to compare individual difference measures between the Primary and Replication studies. *P < 0.05. **P < 0.01. ***P < 0.001.
