Table 3.
Factor loadings for the 18 DSM-IV ADHD Symptoms From Principal Components Analysis
| Factor 1: Number of Symptoms Factor | Factor 2: Symptom Type Factor | |
|---|---|---|
|
Inattention | ||
| Fails to give attention to detail | 0.34 | −0.36 |
| Difficulty sustaining attention | 0.38 | −0.32 |
| Does not seem to listen | 0.41 | −0.25 |
| Does not follow instructions/fails to finish | 0.35 | −0.35 |
| Difficulty organizing | 0.34 | −0.42 |
| Avoids/dislikes tasks that require sustained effort | 0.35 | −0.30 |
| Loses things needed for tasks and activities | 0.33 | −0.30 |
| Is easily distracted by extraneous stimuli | 0.30 | −0.18 |
| Is often forgetful in daily activities | 0.34 | −0.40 |
|
Hyperactivity-Impulsivity |
||
| Fidgets with hands or feet or squirms | 0.38 | 0.28 |
| Often leaves seat when remaining in seat is expected | 0.46 | 0.27 |
| Often runs about or climbs excessively when inappropriate | 0.39 | 0.40 |
| Often has difficulty playing or engaging in leisure activities quietly | 0.39 | 0.41 |
| Is often “on the go” or acts as if “driven by a motor” | 0.32 | 0.44 |
| Often talks excessively | 0.26 | 0.44 |
| Often blurts out answers before questions are completed | 0.37 | 0.48 |
| Often has difficulty waiting turn | 0.38 | 0.37 |
| Often interrupts or intrudes on others | 0.33 | 0.32 |