Table 2

Principle components analysis (oblique rotation) of 47 items of impulsivity: Parent and teacher ratings from Conners and SDQ questionnaires (CP, SP and CT, ST, respectively).

Part 1 – The aggressive behavioral form of impulsivity (factors 1 and 2)

Item
Descriptor
Factor 1
Factor 2

CP47
Temper outbursts
0.950


CP21
Loses temper
0.893


SP5
Often has temper tantrums
0.896


CP31
Irritable
0.840


CP57
Touchy or easily annoyed
0.859


CP77
Mood changes quickly
0.820


CP1
Angry and resentful
0.916


CP40
Actively defies or refuses to
0.780


CP11
Argues with adults
0.826


CP68
Demands to be met at once
0.598


CP28
Excitable, impulsive
0.356


CP70
Spiteful or vindictive
1.000


SP12
Often fights with other children
0.588


CP66
Disturbs other children
0.294


CP64
Get upset if someone rearranges
0.947


SP7
Generally obedient, usually ...
-0.510


ST5
Often has temper tantrums

1.000

CT7
Temper outbursts; explosive,

0.972

CT45
Demands must be met at once

0.898

CT54
Mood changes quickly, drastically

0.945

CT37
Argues with adults

0.957

CT55
Interrupts or intrudes on others

0.655

CT8
Excitable, impulsive

0.661

CT29
Has difficulty waiting in turn

0.606

CT46
Blurts out answers to question

0.674

ST12
Often fights with other children

0.922

CT47
Spiteful or vindictive

0.989

CT20
Leaves seat in classroom or

0.544

ST7
Generally obedient, usually

-0.700

ST25
Good attention span sees

-0.958

Variance Explained
14.6
13.2

Eigen Value
20.4
4.42

Squared Multiple Correlation
0.92
0.90

Oades et al. Behavioral and Brain Functions 2008 4:48   doi:10.1186/1744-9081-4-48