Table 1. Description of measures.
| Assessment period | # items | Mean (SD) | N | |
|---|---|---|---|---|
| Productive Activity – EC | 15 months | 8 | 6.96 (1.38) | 924 |
| 36 months | 11 | 7.19 (2.50) | 903 | |
| Productive Activity – MC | 3rd grade | 21 | 14.85 (3.34) | 893 |
| Productive Activity – EA | 5th grade | 18 | 14.32 (3.05) | 919 |
| Sensitivity – EC | 15 months | 3 | 9.45 (1.63) | 930 |
| 24 months | 3 | 9.42 (1.74) | 902 | |
| 36 months | 3 | 17.32 (2.67) | 901 | |
| Sensitivity – MC | 1st grade | 3 | 16.92 (3.03) | 864 |
| 3rd grade | 3 | 16.40 (2.45) | 875 | |
| Sensitivity – EA | 5th grade | 3 | 16.55 (2.43) | 851 |
| Harshness – EC | 15 months | 5 | 1.62 (.83) | 919 |
| 36 months | 6 | 1.83 (1.14) | 894 | |
| Harshness – MC | 3rd grade | 7 | .77 (1.01) | 894 |
| Harshness – EA | 5th grade | 5 | .31 (.67) | 919 |
| Monitoring | age 15 | 11 | 3.55 (.31) | 935 |
| Self-control | age 15 | 10 | 14.04 (3.46) | 937 |
| Externalizing – EC | 24 months (mother) | 26 | 52.33 (8.34 | 914 |
| 36 months (mother) | 26 | 51.03 (8.33) | 910 | |
| 36 months (teacher) | 26 | 46.10 (9.73) | 630 | |
| 54 months (teacher) | 40 | 49.80 (9.53) | 768 | |
| Externalizing – MC | 1st grade (mother) | 33 | 48.54 (9.67) | 883 |
| 3rd grade (mother) | 33 | 47.17 (9.72) | 917 | |
| 1st grade (teacher) | 34 | 50.57 (8.66) | 860 | |
| 3rd grade (teacher) | 34 | 51.34 (9.21) | 857 | |
| Externalizing – EA | 5th grade (mother) | 33 | 45.72 (9.94) | 923 |
| 6th grade (mother) | 33 | 45.88 (10.05) | 937 | |
| 5th grade (teacher) | 34 | 50.78 (9.12) | 834 | |
| 6th grade (teacher) | 34 | 49.99 (9.10) | 787 | |
| Externalizing– age 15 | age 15 (youth report) | 30 | 49.31 (9.91) | 956 |
Measures with multiple indicators were transformed to z-scores and the mean of the z-scores were used in analyses. EC = early childhood; MC = middle childhood; EA = Early Adolescence