Table 5.
Principal Component Loadings for the Four-Component Level
| Component 1 | Component 2 | Component 3 | Component 4 | |
|---|---|---|---|---|
| Attention Deficit Hyperactivity Disorder | ||||
| A 1. ADHD Inattention | ||||
| a. Makes careless mistakes | 0.49 | 0.08 | 0.26 | 0.20 |
| b. Difficulty sustaining attention | 0.64 | 0.19 | 0.14 | 0.06 |
| c. Often does not seem to listen | 0.59 | 0.07 | 0.24 | 0.05 |
| d. Difficulty following through on instructions | 0.46 | 0.03 | 0.31 | 0.13 |
| e. Difficulty organizing tasks | 0.72 | 0.16 | 0.08 | 0.09 |
| f. Avoids mental effort | 0.55 | 0.18 | 0.23 | 0.23 |
| g. Often loses necessary items | 0.68 | 0.14 | 0.00 | −0.01 |
| h. Often easily distracted | 0.63 | 0.16 | 0.15 | 0.10 |
| i. Often forgetful | 0.73 | 0.21 | 0.07 | 0.13 |
| 2. ADHD Hyperactivity/Impulsivity | ||||
| Hyperactivity | ||||
| a. Often fidgets or squirms | 0.36 | 0.01 | 0.43 | 0.18 |
| b. Difficulty remaining seated | 0.28 | 0.00 | 0.53 | 0.22 |
| c. Inappropriate running about | 0.23 | 0.14 | 0.44 | 0.24 |
| d. Difficulty playing quietly | 0.10 | 0.09 | 0.57 | 0.14 |
| e. Often “on the go” | 0.25 | 0.06 | 0.59 | 0.15 |
| f. Often talks excessively | 0.07 | 0.21 | 0.55 | −0.06 |
| Impulsivity | ||||
| g. Often blurts out answers | 0.13 | 0.24 | 0.59 | −0.01 |
| h. Difficulty awaiting turn | 0.15 | 0.17 | 0.65 | 0.15 |
| i. Often interrupts or intrudes | 0.23 | 0.28 | 0.52 | −0.04 |
| B. Onset before age 7 | 0.51 | −0.00 | 0.43 | 0.05 |
| Impairment: multiple settings | 0.74 | 0.19 | 0.25 | 0.12 |
| Oppositional Defiant Disorder | ||||
| 1. Often loses temper | 0.29 | 0.58 | 0.07 | 0.15 |
| 2. Often argues with adults | 0.13 | 0.69 | 0.18 | 0.17 |
| 3. Defies adults’ requests | 0.10 | 0.59 | 0.06 | 0.18 |
| 4. Deliberately annoys people | 0.01 | 0.62 | 0.13 | 0.13 |
| 5. Blames others for mistakes | 0.05 | 0.55 | 0.27 | 0.06 |
| 6. Touchy/easily annoyed by others | 0.29 | 0.54 | 0.00 | 0.21 |
| 7. Often angry and resentful | 0.15 | 0.48 | 0.09 | 0.32 |
| 8. Often spiteful and vindictive | 0.06 | 0.30 | 0.17 | 0.32 |
| Impairment: multiple settings | 0.20 | 0.85 | 0.15 | 0.14 |
| Duration of 6 months or more | 0.24 | 0.77 | 0.11 | −0.00 |
| Conduct Disorder | ||||
| 1. Often bullies, threatens, or intimidates | 0.08 | 0.11 | 0.10 | 0.56 |
| 2. Often initiates physical fights | 0.08 | 0.14 | 0.13 | 0.43 |
| 3. Used a weapon with potential for harm | −0.00 | 0.33 | 0.16 | 0.43 |
| 4. Cruel to people | 0.15 | 0.07 | 0.07 | 0.49 |
| 5. Cruel to animals | 0.05 | 0.01 | 0.24 | 0.27 |
| 6. Sets fires to cause damage | 0.08 | 0.13 | 0.29 | 0.35 |
| 7. Deliberately destroyed property | 0.08 | 0.23 | 0.07 | 0.52 |
| 8. Broken into house, car, building | 0.04 | −0.04 | −0.09 | 0.49 |
| 9. Lies to con others | 0.20 | 0.35 | 0.26 | 0.30 |
| 10. Stolen nontrivial items | 0.14 | 0.05 | 0.10 | 0.53 |
| 11. Stays out late before age 13 | 0.02 | 0.12 | 0.05 | 0.24 |
| 12. Truant before 13 | −0.00 | 0.04 | −0.07 | 0.50 |
| 13. Impairment – multiple settings | 0.18 | 0.31 | 0.26 | 0.61 |