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Descriptive statistics for indicators comprising the task persistence composite score (N = 390 children in 195 twin pairs)
| Wave 1 |
Wave 2 |
|||||
|---|---|---|---|---|---|---|
| Item (possible range) | M | SD | range | M | SD | range |
| Teacher rating (0 to 2)a | 0.28 | .47 | 0.0 to 2.0 | 0.26 | .46 | 0.0 to 2.0 |
| Tester rating (1 to 5) | 4.28 | .75 | 1.5 to 5.0 | 4.54 | .58 | 2.0 to 5.0 |
| Observer rating (1 to 7) | 6.52 | .69 | 3.0 to 7.0 | 6.71 | .55 | 3.0 to 7.0 |
Note: Higher scores indicate less task persistence; reverse-scored for analyses.
