TABLE 2.
Estimates of the Percentage of Children Who Started or Stopped Exhibiting Disruptive Behaviors Between 29 and 41 Months of Age
| Disruptive Behavior | Starting (%)
|
Stopping (%)
|
1 − Hit Rate
|
False-Alarm Rate
|
||||
|---|---|---|---|---|---|---|---|---|
| Boy | Girl | Boy | Girl | Boy | Girl | Boy | Girl | |
| Opposition-Defiance | ||||||||
| 1. Defiant | 18.1 | 14.6 | 6.4 | 8.3 | 0.64 | 0.67 | 0.39 | 0.54 |
| 2. Didn’t feel guilty | 4.4 | 2.4 | 10.0 | 9.7 | 0.69 | 0.62 | 0.84 | 0.87 |
| 3. Didn’t change behavior | 6.2 | 3.3 | 8.2 | 6.5 | 0.77 | 0.67 | 0.81 | 0.80 |
| Inattention | ||||||||
| 4. Inattentive | 4.9 | 3.6 | 2.1 | 1.3 | 0.87 | 0.91 | 0.74 | 0.78 |
| 5. Easily distracted | 8.1 | 4.6 | 3.0 | 4.2 | 0.83 | 0.82 | 0.65 | 0.81 |
| Hyperactivity | ||||||||
| 6. Restless or hyperactive | 11.8 | 7.5 | 10.9 | 9.4 | 0.45 | 0.50 | 0.43 | 0.55 |
| 7. Fidgets | 5.4 | 5.8 | 18.9 | 13.2 | 0.33 | 0.39 | 0.58 | 0.66 |
| 8. Difficulty waiting | 11.1 | 14.0 | 10.8 | 11.1 | 0.66 | 0.64 | 0.61 | 0.70 |
| Physical Aggression | ||||||||
| 9. Fights | 6.1 | 4.2 | 2.4 | 1.7 | 0.78 | 0.82 | 0.57 | 0.65 |
| 10. Attacks | 2.1 | 1.0 | 1.0 | 1.1 | 0.83 | 0.77 | 0.71 | 0.80 |
Note. These estimates are based on the observed frequencies. “1 − Hit Rate” refers to the proportion of children who, at 41 months of age, exhibited a particular DB on a frequent basis but had not done so one year earlier. The false-alarm rate refers to the proportion of children who, at 29 months of age, had exhibited a particular DB on a frequent basis, but did not do so one year later.